131057-03-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131057-03-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,0,5 and 7 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131057-03:
(8*1)+(7*3)+(6*1)+(5*0)+(4*5)+(3*7)+(2*0)+(1*3)=79
79 % 10 = 9
So 131057-03-9 is a valid CAS Registry Number.
131057-03-9Relevant articles and documents
Syntheses and biological activities of (+/-)-streptovitacin A and E-73.
Kondo,Oritani,Yamashita
, p. 1531 - 1536 (1990)
(+/-)-Streptovitacin A (1) and its stereoisomers were synthesized by an aldol reaction of (+/-)-2,4-dimethyl-4-trimethylsiloxy-1-cyclohexanones (4b and 9) with 4-(2-oxoethyl)-2,6-piperidinedione (5). E-72 (2) was derived from synthetic 1. (+/-)-1 showed m