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157463-12-2

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157463-12-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157463-12-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,4,6 and 3 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 157463-12:
(8*1)+(7*5)+(6*7)+(5*4)+(4*6)+(3*3)+(2*1)+(1*2)=142
142 % 10 = 2
So 157463-12-2 is a valid CAS Registry Number.

157463-12-2Relevant articles and documents

Structure-activity relationships of cephalosporins having a (dimethylisoxazolidlinio)vinyl moiety at their 3-position

Hara, Ryuichiro,Sakamoto, Kenichiro,Hisamichi, Hiroyuki,Nagano, Noriaki

, p. 1162 - 1171 (2007/10/03)

A series of cephalosporins having a (dimethylisoxazolidinio)vinyl group at their 3-position were synthesized to investigate their structure-activity relationships. With regard to the olefin geometry, the (E)-vinyl compound exhibited higher in vitro activity than the (Z)-compound. Regarding the C-7 substituents, the replacement of 2-aminothiazole with 5-amino-1,2,4-thiadiazole increased the anti-pseudomonal activity. Determination of the absolute configuration of the C-3 substituent is also presented. Among the compounds synthesized, we selected 7β-(Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(fluoromethoxyimino)acetamido]-3 -cephem-4-carboxylate (YM-40220), which showed well-balanced in vitro activity and an excellent in vivo efficacy against Staphylococcus aureus Smith, as a candidate for further development.

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