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221637-62-3

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221637-62-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221637-62-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,3 and 7 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 221637-62:
(8*2)+(7*2)+(6*1)+(5*6)+(4*3)+(3*7)+(2*6)+(1*2)=113
113 % 10 = 3
So 221637-62-3 is a valid CAS Registry Number.

221637-62-3Downstream Products

221637-62-3Relevant articles and documents

F-18 labeling of ether-linked analogs of diacylglycerol

Hatano, Kentaro,Ito, Kengo,Ido, Tatsuo

, p. 245 - 253 (1999)

Ether-linked analogs of fluorine-18 labeled diacylglycerol were synthesized in order to improve their bioavailability in vivo. Compounds were designed to have long chain (having sixteen carbons) alkyl substituent on 1-O-position and short alkyl or acyl group (eight carbons) on 2-O-position of glycerol. Introduction of 18F into each chain resulted in four labeled tracers. Precursors having tosyloxy or bromo moiety as leaving group were obtained step wise alkylations and/or acylations of 3-O-benzylglycerol. Nucleophilic radiofluorination of the precursors thus obtained gave labeled intermediates in up to 40% radiochemical yield. Ether-linked diacylglycerol analogs were afforded through their deprotection with H2 and Pd/C. Catalytic transfer hydrogenation was also attempted, however, insufficient result was achieved in spite of its usefulness as labeling procedure.

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