51787-31-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51787-31-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,7,8 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 51787-31:
(7*5)+(6*1)+(5*7)+(4*8)+(3*7)+(2*3)+(1*1)=136
136 % 10 = 6
So 51787-31-6 is a valid CAS Registry Number.
51787-31-6Relevant articles and documents
Base-catalyzed autoxidation of 20-hydroxyecdysone: Synthesis of calonysterone and 920-dihydroxyecdysone
Suksamrarn, Apichart,Ganpinyo, Penpan,Sommechai, Chatriwat
, p. 4445 - 4448 (1994)
Base-catalyzed autoxidation of 20-hydroxyecdysone (2) gave an unusually modified ecdysteroid calonysterone (1) and 9,20-dihydroxyecdysone (4).
