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5-Amino-1-(4-tert-butyl-phenyl)-1H-pyrazole-4-carboxylic acid ethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

203123-01-7

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203123-01-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 203123-01-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,1,2 and 3 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 203123-01:
(8*2)+(7*0)+(6*3)+(5*1)+(4*2)+(3*3)+(2*0)+(1*1)=57
57 % 10 = 7
So 203123-01-7 is a valid CAS Registry Number.

203123-01-7Relevant academic research and scientific papers

Synthesis of Pyrazolo[3,4-c][1,2]thiazin-4(3H)-one 2,2-Dioxides, New Heterocycles

Coppo, Frank T.,Fawzi, Maged M.

, p. 1693 - 1697 (1997)

The reaction of substituted ethyl 5-aminopyrazole-4-carboxylatcs with two equivalents of methanesulfonyl chloride gave the substituted ethyl 5-[bis(methylsufonyl)amino]-1H-pyrazole-4-carboxylates II. Removal of one of the methanesulfonyl groups, followed

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