![189321-66-2,4-BOC-2-MORPHOLINECARBOXYLIC ACID,4-(tert-Butoxycarbonyl)morpholine-2-carboxylicacid;4-(tert-Butyloxycarbonyl)morpholine-2-carboxylic acid;4-Boc-morpholine-2-carboxylic acid;4-[[(1,1-Dimethylethyl)oxy]carbonyl]-2-morpholinecarboxylic acid;N-(tert-Butoxycarbonyl)morpholine-2-carboxylic acid;N-Bocmorpholine-2-carboxylic acid;](http://file1.lookchem.com/300w/substances/2022-02-17-02/7f03f6a2-e49e-4422-8545-66bb86ce3160.png)
4-BOC-2-MORPHOLINECARBOXYLIC ACID(189321-66-2)
- CAS Registry Number:
- 189321-66-2
- Synonyms:
- 4-(tert-Butoxycarbonyl)morpholine-2-carboxylicacid;4-(tert-Butyloxycarbonyl)morpholine-2-carboxylic acid;4-Boc-morpholine-2-carboxylic acid;4-[[(1,1-Dimethylethyl)oxy]carbonyl]-2-morpholinecarboxylic acid;N-(tert-Butoxycarbonyl)morpholine-2-carboxylic acid;N-Bocmorpholine-2-carboxylic acid;
- Molecular Formula:
- C10H17NO5
- Molecular Weight:
- 231.249
- EINECS:
CAS No.:189321-66-2
Name: 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Related Suppliers
CAS No.189321-66-2 4-Boc-2-morpholinecarboxylic acid
Assay:98% Appearance:detailed see specifications Package:according to the clients requirement Storage:Store in dry, dark and ventilated place. Transportation:by sea or by air Application:It is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff.
Min. Order:1Kilogram
Supplier:Dayang Chem (Hangzhou) Co.,Ltd. [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:99% Appearance:white powder Package:suitable for delivery Storage:closed and cool Transportation:Aluminum foil bag for within 10kg Fiber drum for 10kg and more Shipping: By air, by sea or by courier (VIP account of TNT, DHL, Fedex and EMS) Application:pharmaceutical/pesticide intermediate
Min. Order:1Gram
Supplier:Jinan Finer Chemical Co., Ltd [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2- MORPHOLINECARBOXYLIC ACID
Assay:99% Appearance:White powder Package:bag Storage:Room temperature Transportation:by sea, air, courier Application:Organic Chemicals
Min. Order:1Kilogram
Supplier:HENAN NEW BLUE CHEMICAL CO.,LTD [
China (Mainland)]
CAS No.189321-66-2 4-(tert-Butoxycarbonyl)morpholine-2-carboxylic acid
Assay:99%min. Appearance:white powder Package:1kg/Export worthy packing; 25kg/drum Storage:In well-closed container, protected from light and in cool & dry place. Transportation:By Air, By Sea, By courier (door to door, DHL/FedEx/UPS) Application:R&D and production for pharmaceuticals and chemicals
Min. Order:1Gram
Supplier:LIDE PHARMACEUTICALS LIMITED [
China (Mainland)]
CAS No.189321-66-2 cas:189321-66-2
Assay:99% Appearance:powder or liquid Package:according to customer requirements Storage:store in dry dark and ventilated place Transportation:By Sea/Air/Courier Application:It is an important raw material.
Min. Order:10Gram
Supplier:Zibo Hangyu Biotechnology Development Co., Ltd [
China (Mainland)]
CAS No.189321-66-2 Morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99% Appearance:white powder Package:According to the customer's requestment Storage:Store in dry, dark and ventilated plac... Transportation:Fast! Safe! Promise 100% safe and successful transportation. Door to door transportation services. Application:Pharmaceutical intermediates
Min. Order:1Kilogram
Supplier:RongNa Biotechnology Co., Ltd [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99% Appearance:Brown powder Package:According to customer requirements Storage:Sealed and preserved Transportation:Sea or Air Application:It is an important raw material and intermediate
Min. Order:1Gram
Supplier:Qingdao Beluga Import and Export Co., LTD [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:98% Appearance:Off-White to Pale Beige Solid Package:25kg fiber drums Storage:Sealed in dry,2-8掳C Transportation:multiple transportation for your choose , according to your demand Application:pharm intermediate189321-66-2
Min. Order:1Gram
Supplier:HANGZHOU TIANYE CHEMICALS CO., LTD. [
China (Mainland)]
CAS No.189321-66-2 Morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99.00% Appearance:White Powder Package:25KG/Drum Storage:Preserve in tight, light-resistant containers Transportation:By Air& By Sea Application:Pharmaceutical
Min. Order:1Kilogram
Supplier:Golden Pharma Co., Limited [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:99% Appearance:powder Package:Ex-factory package Storage:Keep in dark place,Sealed in dry,Room Temperature Transportation:1.Stock products are normally shipping within 3 working days. 2.For rush delivery, please contact our sales team for particular arrangement. Shipping Details: 1.We ship goods via DHL, Application:Organic chemicals
Min. Order:1Gram
Supplier:HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99.0% Appearance:liquid Package:Grams, Kilograms Storage:Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials. Transportation:According to customer request Application:For R&D and commerical use
Min. Order:100Gram
Supplier:Chemlyte Solutions [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99% Appearance:White Powder Package:25kg/drum, also according to the clients requirement Storage:Store In Dry, Cool And Ventilated Place Transportation:By Sea Or By Air Application:It is widely used as a thickener, emulsifier and stabilizer
Min. Order:1Kilogram
Supplier:EAST CHEMSOURCES LIMITED [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:NLT 98% Appearance:White powder Package:Aluminum bag/Carton Drum Storage:Store in a tightly closed container, in a cool and dry place. Transportation:By air Application:Used in producing API
Min. Order:0
Supplier:Hangzhou Huarong Pharm Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:98% or more Appearance:high quality Package:5kg 25kg According to clients' requirement Storage:Store in dry, dark and ventilated place Application:Intermediate and Industrial use
Min. Order:0Metric Ton
Supplier:Hangzhou Keyingchem Co.,Ltd [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99% Package:25kg/drum Storage:Sealed and preserved Transportation:By sea/By air/By courier Application:Chemical raw materials
Min. Order:0
Supplier:Hangzhou ZeErRui Chemical Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 Boc-2-carboxyMorpholine
Assay:0.98 Appearance:Off white to slight yellow solid Package:1L 5L 10L 25L bottle Storage:Stored in shaded, cool and dry places Transportation:Handle with cares to avoid damaging the packages. Protect them from sunshine or rain. We can send by Fedex, by ship or by plane according to international rules. Application:pharma intermediate
Min. Order:0
Supplier:Antimex Chemical Limied [
China (Mainland)]
CAS No.189321-66-2 4-(tert-Butoxycarbonyl)Morpholine-2-carboxylic acid
Assay:97% Appearance:To be subject to the object Package:Customized Transportation:Air Application:pharmaceutical intermediates
Min. Order:0
Supplier:Hangzhou Dingyan Chem Co., Ltd [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:99% Package:25kg/Drum Storage:100tons Transportation:By air/By sea Application:Chemical industry
Min. Order:0
Supplier:Hebei Mujin Biotechnology Co.,Ltd [
China (Mainland)]
CAS No.189321-66-2 4-Boc-2-Morpholinecarboxylic acid
Assay:98% Package:25kg/drum,or as per customers'demand Transportation:air,sea,courier Application:API,Pharmaceutical intermediates
Min. Order:0
Supplier:GIHI CHEMICALS CO.,LIMITED [
China (Mainland)]
CAS No.189321-66-2 N-Boc-Morpholine-2-carboxylic acid
Assay:99% Appearance:Solid Storage:Protect from light and keep dry Application:Pharmaceutical intermediates
Min. Order:0
Supplier:ORCHID CHEMICAL SUPPLIES LTD [
China (Mainland)]
CAS No.189321-66-2 4-Boc-2-morpholinecarboxylic acid
Assay:98% Application:Synthetic building block
Min. Order:0
Supplier:SAGECHEM LIMITED [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:99% Application:Used as pharmaceutical intermediate
Min. Order:0
Supplier:Shandong Hanjiang Chemical Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2- MORPHOLINECARBOXYLIC ACIDCAS NO.: 189321-66-2
Assay:0.99 Appearance:Powder Package:As required Storage:Room temperature Transportation:By Sea/Air/DHL Application:medical
Min. Order:1Kilogram
Supplier:Henan Wentao Chemical Product Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 4-Boc-2-Morpholinecarboxylic acid
Assay:98%min Appearance:Off-white to light yellow powder Package:According to the clients requirement. Storage:Keep in cool place. Application:Pharmaceutical intermediates
Min. Order:0
Supplier:Hangzhou J&H Chemical Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:98% Appearance:powder Package:as requested Storage:store in cool, dry place Transportation:by sea or by air Application:189321-66-2
Min. Order:1Kilogram
Supplier:HENAN SUNLAKE ENTERPRISE CORPORATION [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:鈮?9.0% Appearance:White powder Package:25kg drum/bag Storage:Keep in dry and cool place Transportation:by Sea, air and express Application:銆?Use 1 銆? A nutritional supplement. One of the essential amino acids in the human body. Because the price is higher than DL-methionine and the effect is equal, DL-methionine is often used. 銆?Use
Min. Order:1Metric Ton
Supplier:KAISA GROUP INC [
United States]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:99% Package:box or opp package Storage:cool drum Transportation:air or sea Application:4-BOC-2-MORPHOLINECARBOXYLIC ACID
Min. Order:1Milligram
Supplier:weifang yangxu group co.,ltd [
China (Mainland)]
CAS No.189321-66-2 4-Boc-2-morpholinecarboxylic acid
Assay:99 Appearance:powder, or liquid Package:Bottle, barrel, cargo, container, etc. Storage:Stored in room temperature, ventilated place Transportation:By air, ship, express, etc. Application:Pharmaceuticals, intermediates, APIs, custom synthesis, chemicals
Min. Order:0
Supplier:LEAP CHEM Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 Boc-Cop-OH
Assay:99% Appearance:white powder Package:25kg,50kg,180kg,200kg,250kg,1000kg锛宑ustomization Storage:Keep it in dry,shady and cool place Transportation:by express or by sea Application:Pharma;Industry;Agricultural;chemical reaserch
Min. Order:0
Supplier:Wuhan Circle Star Chem-medical Technology co.,Ltd. [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:98% Application:For research use only.
Min. Order:0
Supplier:Hebei Jinshengzhongtai Industry Co.,Ltd [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99% Appearance:liquid or powder Package:according to the clients requirement Storage:Dry and Cool Place Transportation:UPS FedEx ,DHL,EXPRESS LINE Application:healing drugs
Min. Order:1Gram
Supplier:Shandong Mopai Biotechnology Co., LTD [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99% Appearance:white powder Package:drum or based on customers' requirement Storage:normal temperature storage Transportation:by sea, by air Application:We have different specifications for different applications
Min. Order:1Metric Ton
Supplier:Bluecrystal chem-union [
China (Mainland)]
CAS No.189321-66-2 4-Boc-2-morpholinecarboxylicacid
Assay:97% Appearance:Powder or liquid Package:According to customer Storage:Store in a tightly closed container, in a cool and dry place. Transportation:Fedex,DHL,TNT,BY SEA and BY AIR Application:Medicinal Chemistry Biomedicine Pharmaceutical intermediates Chemistry experiment Biological experiments Chemical reagent For R&D use only.
Min. Order:10Milligram
Supplier:Amadis Chemical Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:99% Appearance:powder Package:1kg/bag; 101kg/drum, or as customer's required Storage:Keep in a cool & dry place Transportation:by air/by sea
Min. Order:0Metric Ton
Supplier:Jiangsu Congzhong Chemical Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 Acmec N-Boc-Morpholine-2-carboxylic acid 25g
Assay:98% Appearance:See the datasheet Package:25g Storage:2-8掳C,Dry Transportation:By Express, Air and Road Application:Analytical reagent, biochemical reagent, standard
Min. Order:1bottle
Supplier:Shanghai Acmec Biochemical Technology Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 morpholine-2,4-dicarboxylic acid 4-tert-butyl ester
Assay:99% Package:According to the customer request Transportation:According to the customer request Application:intermediate of Antimicrobial agent and Antioxidant
Min. Order:100Gram
Supplier:SHANGHAI SYSTEAM BIOCHEM CO., LTD [
China (Mainland)]
CAS No.189321-66-2 N-Boc-morpholine-2-carboxylic acid
Assay:99% Appearance:light yellow solid Storage:Sealed in dry,Room Temperature Application:Chemical raw materials, pharmaceutical intermediates
Min. Order:1Kilogram
Supplier:Ningbo Syntame Biotech Co.,Ltd [
China (Mainland)]
CAS No.189321-66-2 N-Boc-Morpholine-2-carboxylic acid
Assay:98%min Appearance:95%+ Package:R&D,Pilot run Transportation:per client require Application:organic intermediates
Min. Order:0Metric Ton
Supplier:Hunan chemfish Pharmaceutical co.,Ltd [
China (Mainland)]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:98% Package:bottle Transportation:Sealed drying锛?5鈩冿級 Application:Drug R&D
Min. Order:1Gram
Supplier:Suzhou Sibian Chemical Technology Co., Ltd [
China (Mainland)]
CAS No.189321-66-2 N-Boc-Morpholine-2-carboxylic acid 189321-66-2
Assay:97+% Appearance:solid or liquid Package:Foil bag; Drum; Plastic bottle Storage:in sealed air resistant place Transportation:by sea or air Application:Pharma;Industry;Agricultural
Min. Order:0
Supplier:Hunan Russell Chemicals Technology Co.,Ltd [
China (Mainland)]
CAS No.189321-66-2 4-Boc-2-morpholinecarboxylic acid manufacturer
Assay:97% Appearance:White powder Package:According client's requirements Storage:keep sealed and keep from direct light Transportation:According client's requirements Application:pharmaceutical
Min. Order:0
Supplier:Shanghai Yuanye Bio-Technology Co., Ltd. [
China (Mainland)]
CAS No.189321-66-2 4-(Tert-butoxycarbonyl)morpholine-2-carboxylic acid cas no. 189321-66-2 98%
Assay:0.98 Package:Grams, Kilograms Transportation:According to customer request Application:For R&D
Min. Order:0
Supplier:Win-Win chemical Co.Ltd [
China (Mainland)]
CAS No.189321-66-2 Boc-(R,S)-2-carboxymorpholine
Assay:鈮?98 % (NMR) Appearance:White to off-white powder Storage:Store at 2-8 掳C Application:For research use only.
Min. Order:0
Supplier:BOC Sciences [
United States]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:99% Application:API
Min. Order:0
Supplier:NUTROCHEM- MANUFACTURE PLACE [
South Africa]
CAS No.189321-66-2 4-BOC-2-MORPHOLINECARBOXYLIC ACID
Assay:98% Application:For research use only.
Min. Order:0
Supplier:Qingdao Bravery International Trade Co., Ltd [
China (Mainland)]
- RongNa Biotechnology Co., Ltd
China (Mainland)
- Tel:+86-18560316533
- No. 416, 4th floor, zhongguancun science and technology city, no. 1, west 6th road, zhangdian district
- RongNa Biotechnology Co., Ltd
China (Mainland)
- Tel:+86-18560316533
- No. 416, 4th floor, zhongguancun science and technology city, no. 1, west 6th road, zhangdian district
- Hangzhou Huarong Pharm Co., Ltd.
China (Mainland)
- Tel:+86-571-86758373
- Room1101, Hakim International Building, Gongshu District, Hangzhou, Zhejiang Province, China.
- LIDE PHARMACEUTICALS LIMITED
China (Mainland)
- Tel:+86-25-58409506
- 11F, Building A1, No.288 North Zhongshan Road, Gulou District, Nanjing,210003, P.R.China.
- Dayang Chem (Hangzhou) Co.,Ltd.
China (Mainland)
- Tel:+86-571-88938639
- 9/F, Unit 2 Changdi Torch Building, 259# WenSan Road, Xihu District, Hangzhou City 310012, P.R.China
- weifang yangxu group co.,ltd
China (Mainland)
- Tel:+08613666361637--
- No 5.dongfeng east street.gaoxin district.weifang city.
- Hebei Jinshengzhongtai Industry Co.,Ltd
China (Mainland)
- Tel:00-86-15028839191
- Room 1805, Block B, Jinyuan Building, Shijiazhuang, Hebei, China
- Qingdao Bravery International Trade Co., Ltd
China (Mainland)
- Tel:188-5422-6718
- No 216, Tongchuan Road Licang Area, Qingdao City, China
- Jiangsu Congzhong Chemical Co., Ltd.
China (Mainland)
- Tel:86-13862111431-13862111431
- 江苏省苏州市相城区高铁新城南天成路66号万汇商务广场1幢920室
- KAISA GROUP INC
United States
- Tel:+1(314)954-83-86
- 1312 17th Street Suite 1402 Denver CO 80202
- NUTROCHEM- MANUFACTURE PLACE
South Africa
- Tel:27-838631975
- Stasieweg 019 Bethal Bethal Mpumalanga
- Shanghai Acmec Biochemical Technology Co., Ltd.
China (Mainland)
- Tel:86-400-9004166
- 459 Nanzhong Road, Nanqiao, Xingtang County, Fengxian Districtct, Shanghai
- Shandong Mopai Biotechnology Co., LTD
China (Mainland)
- Tel:+86-15965530500
- shandong
- Shandong Mopai Biotechnology Co., LTD
China (Mainland)
- Tel:+86-15965530500
- shandong
- Golden Pharma Co., Limited
China (Mainland)
- Tel:18958062155
- 1
- Wuhan Circle Star Chem-medical Technology co.,Ltd.
China (Mainland)
- Tel:+86-13437180835
- Room 02-31, 13 / F, Building 9, Guannan Fuxing Medical Park Phase II, No.58, Guanggu Avenue, East Lake New Technology Development Zone, Wuhan, Hubei, China (Wuhan Area, Free Trade Zone)
- HANGZHOU TIANYE CHEMICALS CO., LTD.
China (Mainland)
- Tel:0571-85083592
- 1208# HuaCe Building-B,Wuchanggang Road,XIHU District,Hangzhou City,Zhejiang Province ,China
- HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
China (Mainland)
- Tel:+8615383190639-15383190639-15383190639
- Hao Shun Hua Yue City
- Bluecrystal chem-union
China (Mainland)
- Tel:+86-1895157
- Liang Xi Qu
- LEAP CHEM Co., Ltd.
China (Mainland)
- Tel:+852-30606658
- EASEY COMM BLDG 253-261 HENNESSY ROAD Hong Kong, China
- Qingdao Beluga Import and Export Co., LTD
China (Mainland)
- Tel:+8613854236000
- qingdao
- Qingdao Beluga Import and Export Co., LTD
China (Mainland)
- Tel:+8613854236000
- qingdao
- Shandong Hanjiang Chemical Co., Ltd.
China (Mainland)
- Tel:+86 18369939125
- No.25A Qilu Industrial Park
- Chemlyte Solutions
China (Mainland)
- Tel:+86-189 8945 5137
- Jian Qiao Community, 789 Shenhua Road, Xihu District, Hangzhou, China, 310000
- Chemlyte Solutions
China (Mainland)
- Tel:+86-189 8945 5137
- Jian Qiao Community, 789 Shenhua Road, Xihu District, Hangzhou, China, 310000
- Chemlyte Solutions
China (Mainland)
- Tel:+86-189 8945 5137
- Jian Qiao Community, 789 Shenhua Road, Xihu District, Hangzhou, China, 310000
- Hebei Mujin Biotechnology Co.,Ltd
China (Mainland)
- Tel:13231137666
- hebei province,China
- Henan Wentao Chemical Product Co., Ltd.
China (Mainland)
- Tel:+86-370-2722992
- 32 Room, 5th Floor, Building 11, No. 6 Yinxing Road, High-tech Industrial Development Zone, Zhengzhou City, Henan Province
- Hangzhou Keyingchem Co.,Ltd
China (Mainland)
- Tel:+86-571-85378921
- Jintong international Building, No.113,Huayuangang Street, Gong shu District, Hangzhou,Zhejiang, China.
- Ningbo Syntame Biotech Co.,Ltd
China (Mainland)
- Tel:0086-574-28802872
- No. 2 Building of Ruiding accelerator,No. 789, Xiaying North Road, Ningbo, Zhejiang
Other Product
- -
- -
- -
- -
- -
- -
- -
- -
- -
- (4S,6R)-6-{2-[(2-hydroxy-ethyl)-(4-methoxy-benzenesulfonyl)-amino]-ethoxy}-4-isopropyl-5,6-dihydro-4H-pyran-2-carboxylic acid allyl ester
- [1,4'-Bipiperidine]-1'-carboxylic acid, 4-(1H-indol-7-yl)-, ethyl ester
- 1,3,5-Tris(4-acetamidophenyl)penta-1,5-dione
- 1,5-Bis(3-aminophenyl)-3-(4-N,N-di-methylaminophenyl)penta-1,5-dione
- 1,5-Bis(4-acetamidophenyl)-3-phenylpenta-1,5-dione
- 1,5-Bis(4-aminophenyl)-3-(4-acetamido-phenyl)penta-1,5-dione
- 1,5-Bis(4-aminophenyl)-3-phenylpenta-1,5-dione