137121-56-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137121-56-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,1,2 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 137121-56:
(8*1)+(7*3)+(6*7)+(5*1)+(4*2)+(3*1)+(2*5)+(1*6)=103
103 % 10 = 3
So 137121-56-3 is a valid CAS Registry Number.
137121-56-3Relevant academic research and scientific papers
Preparation of (9Z, 11Z) - Vitamin A
Vogt, Peter,Schlageter, Markus,Widmer, Erich
, p. 4115 - 4116 (2007/10/02)
Starting from (7E,9Z)-C15-aldehyde 4, the syntheses of (9Z, 11Z)-vitamin A acetate and palmitate are reported. The construction strategy is based on treatment of 4 with Zn-PPh3/CBr4, addition of acetaldehyde followed by a
