Cas 75239-09-7,ethyl α-phenylhydrazono-5-methyl-1-phenylpyrazole-4-glyoxalate

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Check Digit Verification of cas no

The CAS Registry Mumber 75239-09-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,2,3 and 9 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 75239-09:
(7*7)+(6*5)+(5*2)+(4*3)+(3*9)+(2*0)+(1*9)=137
137 % 10 = 7
So 75239-09-7 is a valid CAS Registry Number.

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75239-09-7Relevant academic research and scientific papers

Reaction of Ethyl 3-Ethoxymethylene-2,4-dioxovalerate with Monosubstituted Hydrazines

Kurihara, Takushi,Uno, Toshiko,Sakamoto, Yasuhiko

, p. 231 - 233 (2007/10/02)

Reactions of ethyl 3-ethoxymethylene-2,4-dioxovalerate (1) with phenyl- and methylhydrazines are described.While the reaction of 1 with phenylhydrazine gave a mixture of ethyl 4-acetyl-1-phenylpyrazole-5-carboxylate (4) and ethyl 5-methyl-1-phenylpyrazole

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