138505-32-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138505-32-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,0 and 5 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 138505-32:
(8*1)+(7*3)+(6*8)+(5*5)+(4*0)+(3*5)+(2*3)+(1*2)=125
125 % 10 = 5
So 138505-32-5 is a valid CAS Registry Number.
138505-32-5Relevant articles and documents
Application of efficient glycosylation of 2,6-anhydro-2-thio sugar to the total synthesis of erythromycin A
Toshima,Mukaiyama,Yoshida,Tamai,Tatsuta
, p. 6155 - 6158 (1991)
The total synthesis of erythromycin A (1) from (9S)-9-dihydroerythronolide A (2) was achieved efficiently by the highly stereoselective and powerful glycosylation of 2,6-anhydro-2-thio sugar 9 as a key step.