89991-37-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89991-37-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,9 and 1 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 89991-37:
(7*8)+(6*9)+(5*9)+(4*9)+(3*1)+(2*3)+(1*7)=207
207 % 10 = 7
So 89991-37-7 is a valid CAS Registry Number.
89991-37-7Relevant articles and documents
A FACILE ROUTE TO 3,4-SYMMETRICALLY SUBSTITUTED 2-CARBETHOXY-5-METHYLPYRROLES
Williams, Peter D.,LeGoff, Eugene
, p. 269 - 270 (2007/10/02)
A synthesis of 3,4-disubstituted 2-carbethoxy-5-methylpyrroles from alkenes via isoxazoles is described.