(2S,5S)-5-benzyl-2-methyl-3,6-dioxo-2,3,5,6,9,10-hexahydro-oxazolo[3,2-a]pyrrolo[2,1-c]pyrazine-2-carboxylic acid ethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 99887-33-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,8 and 7 respectively; the second part has 2 digits, 3 and 3 respectively. Calculate Digit Verification of CAS Registry Number 99887-33: (7*9)+(6*9)+(5*8)+(4*8)+(3*7)+(2*3)+(1*3)=219 219 % 10 = 9 So 99887-33-9 is a valid CAS Registry Number.
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