131566-05-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131566-05-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,5,6 and 6 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 131566-05:
(8*1)+(7*3)+(6*1)+(5*5)+(4*6)+(3*6)+(2*0)+(1*5)=107
107 % 10 = 7
So 131566-05-7 is a valid CAS Registry Number.
131566-05-7Relevant articles and documents
Synthesis of trans-Caran-4-carboxylic Acids
Fringuelli, F.,Minuti, L.,Taticchi, A.
, p. 2507 - 2517 (2007/10/02)
The synthesis of the optically active trans-caran-4-carboxylic acid 4a and 5a is reported.Methylene-cis and trans-caranes (8) and (9) were prepared by Wittig reaction from (-)-cis-caran-4-one (6).The structure of the described compounds are supported by chemical evidence.