491610-54-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 491610-54-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,1,6,1 and 0 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 491610-54:
(8*4)+(7*9)+(6*1)+(5*6)+(4*1)+(3*0)+(2*5)+(1*4)=149
149 % 10 = 9
So 491610-54-9 is a valid CAS Registry Number.
491610-54-9Relevant academic research and scientific papers
Synthesis of new pyrido[4″,3″:4′,5′]thieno[2′,3′:4, 5]pyrimido-[2,1-b][1,3,4]thiadiazine derivatives
Ahmed, Essam Kh.
, p. 989 - 1000 (2007/10/03)
Ethyl 2-methyl-11-oxo-9, 10-dihydro-1H, 11H-pyrido[4″,3″:4′,5′]thieno-[2′,3′:4, 5]pyrimido[2,1-b][1,3,4]thiadiazine-8(7H)-carboxylate 7 has been synthesised by the reaction of ethyl 3-amino-4-oxo-2-thioxo-1,3,4,5,6,8-hexahydropyrido[4′,3′:4,5] thieno[2,3-
