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77120-91-3

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77120-91-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77120-91-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,1,2 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 77120-91:
(7*7)+(6*7)+(5*1)+(4*2)+(3*0)+(2*9)+(1*1)=123
123 % 10 = 3
So 77120-91-3 is a valid CAS Registry Number.

77120-91-3Relevant articles and documents

3(1-hydoxyethyl)azetidinone compounds and their production

-

, (2008/06/13)

An amino acid compound of the formula: STR1 wherein R is a lower alkyl group, R1 is a hydrogen atom or a protecting group for carboxyl, R2 is a hydrogen atom, a protecting group for amino, an optionally substituted allyl group of the formula: STR2 (wherein R3 and R4 are each a hydrogen atom, a lower alkyl group or an aryl group), a beta-hydroxyethyl group in which the hydroxyl group is optionally protected, a formylmethyl group in which the formyl group is optionally protected, a carboxymethyl group in which the carboxyl group is protected or a 2-furylmethyl group and X is an optionally protected carboxyl group, a hydroxymethyl group in which the hydroxyl group is optionally protected or a substituted mercaptomethyl group of the formula: (wherein R5 is an aryl group or an ar(lower)alkyl group), which is a useful intermediate in the synthesis of 1-alkylcarbapenem compounds.

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