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105995-50-4

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105995-50-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 105995-50-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,9,9 and 5 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 105995-50:
(8*1)+(7*0)+(6*5)+(5*9)+(4*9)+(3*5)+(2*5)+(1*0)=144
144 % 10 = 4
So 105995-50-4 is a valid CAS Registry Number.

105995-50-4Relevant articles and documents

PROCESS FOR THE PREPARATION OF CARBAPENEM COMPOUNDS

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Page/Page column 7-9, (2011/10/04)

The present invention relates to a process for the preparation of carbapenem compound of Formula (I), wherein P1 is hydrogen or a carboxyl protecting group, P3 is hydrogen or a hydroxyl protecting group, R1 is C1-3 alkyl, and A is selected from a group consisting of a) Formula (II), b) Formula (III), c) Formula (IV), d) Formula (V), e) Formula (VI), f) Formula (VII), wherein P2 is hydrogen or an amino protecting group, R2 and R3 may be same or different and are hydrogen, C1-5 alkyl, optionally substituted aryl, or optionally substituted heteroaryl, and X1 is O or S, or its stereoisomers, or salts thereof.

4-substituted 3-oxobutanoate ester derivatives

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, (2008/06/13)

This invention relates to a process for preparing 4-substituted 3-oxobutanoate ester derivatives by reaction of essentially anhydrous magnesium malonate monoester salts with activated acyl compounds.

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