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18598-31-7

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18598-31-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18598-31-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,5,9 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 18598-31:
(7*1)+(6*8)+(5*5)+(4*9)+(3*8)+(2*3)+(1*1)=147
147 % 10 = 7
So 18598-31-7 is a valid CAS Registry Number.

18598-31-7Relevant articles and documents

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Petrzilka et al.

, p. 2911,2923 (1977)

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Process for preparing cephem lactones for cephalosporin-type antibiotics

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, (2008/06/13)

Cephem lactones of formula (1) STR1 wherein R1 is hydrogen or an organic substituent of the type appearing as the 6-substituent of penicillins or as the 7-substituent of cephalosporins are produced from corresponding 4,5-halohydrin precursors thereof by dehalogenation. Novel stereoisomers of formula (1) compounds as well as novel intermediates for cephem lactone syntheses are disclosed. The cephem lactones produced according to the invention are of utility as intermediates for cephem-type antibiotics and have antibiotic properties of their own.

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