1-Methyl-4,7-dioxo-1,4,5,6,7,8-hexahydro-pyrrolo[2,3-b]azepine-3,5-dicarboxylic acid 3-ethyl ester 5-methyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 78994-91-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,9,9 and 4 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 78994-91: (7*7)+(6*8)+(5*9)+(4*9)+(3*4)+(2*9)+(1*1)=209 209 % 10 = 9 So 78994-91-9 is a valid CAS Registry Number.