131118-47-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131118-47-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,1,1 and 8 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 131118-47:
(8*1)+(7*3)+(6*1)+(5*1)+(4*1)+(3*8)+(2*4)+(1*7)=83
83 % 10 = 3
So 131118-47-3 is a valid CAS Registry Number.
131118-47-3Relevant articles and documents
Total synthesis of the ethyl ester of the major urinary metabolite of prostaglandin E2
Taber, Douglass F.,Teng, Dawei
, p. 1607 - 1612 (2002)
The preparation of the ethyl ester of the major urinary metabolite of prostaglandin E2 3 is described. The key step is the kinetic opening of the TBS-protected bicyclic ketone 7 with thiophenol.