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80628-86-0

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80628-86-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80628-86-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,6,2 and 8 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 80628-86:
(7*8)+(6*0)+(5*6)+(4*2)+(3*8)+(2*8)+(1*6)=140
140 % 10 = 0
So 80628-86-0 is a valid CAS Registry Number.

80628-86-0Relevant articles and documents

Process for the preparation of 3-exomethylene cepham derivatives

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, (2008/06/13)

A process is provided for the preparation of 3-methylene and 3-halomethylene cepham derivatives via 3-phosphoniomethyl-3-cephem derivatives, which in turn can be prepared from 3-halomethyl-3-cephem derivatives. The preparation can be carried out with or without isolating the intermediate phosphonium cephem compounds. The 3-methylene and 3-halomethylene cepham derivatives and in particular the 1-oxo and 1,1-dioxo cepham compounds are also prepared by reducing a 3-halomethyl-3-cephem derivative with activated metal, preferably zinc or magnesium.

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