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diphenylmethyl 3-t-butyldimethylsiloxymethyl-3-cephem-4-carboxylate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128989-89-9

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128989-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128989-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,8 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 128989-89:
(8*1)+(7*2)+(6*8)+(5*9)+(4*8)+(3*9)+(2*8)+(1*9)=199
199 % 10 = 9
So 128989-89-9 is a valid CAS Registry Number.

128989-89-9Relevant academic research and scientific papers

Synthesis and β-lactamase inhibitory activity of 3-cyano-3-cephem derivatives

Nishimura,Yasuda,Sasaki,Matsumoto,Kamimura,Sakane,Takaya

, p. 412 - 416 (2007/10/02)

Two new 3-cyano-3-cephem derivatives, potassium 3-cyano-3-cephem-4-carboxylate (2) and potassium 7α-phenylacetamido-3-cyano-3-cephem-4-carboxylate (3), were prepared from 7β-aminocephalosporanic acid. Compounds 2 and 3 showed only weak β-lactamase inhibitory activity in contrast to sodium 7α-[(1R)-1-hydroxyethyl]-3-cyano-3-cephem-4-carboxylate (1), indicating the important role of the 7α-(1-hydroxyethyl) substituent for β-lactamase inhibitory activity.

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