Aspidospermidine-3-carboxylic acid, 2,3,6,7-tetradehydro-, methyl ester, hydrochloride, (5α,12β,19α)- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 28972-21-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,9,7 and 2 respectively; the second part has 2 digits, 2 and 1 respectively. Calculate Digit Verification of CAS Registry Number 28972-21: (7*2)+(6*8)+(5*9)+(4*7)+(3*2)+(2*2)+(1*1)=146 146 % 10 = 6 So 28972-21-6 is a valid CAS Registry Number.