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757964-89-9

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757964-89-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 757964-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,5,7,9,6 and 4 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 757964-89:
(8*7)+(7*5)+(6*7)+(5*9)+(4*6)+(3*4)+(2*8)+(1*9)=239
239 % 10 = 9
So 757964-89-9 is a valid CAS Registry Number.

757964-89-9Downstream Products

757964-89-9Relevant articles and documents

PREPARATION OF QUINAPRIL HYDROCHLORIDE

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Page/Page column 5, (2008/06/13)

Methods and materials for preparing quinapril, its pharmaceutically acceptable salts, including quinapril hydrochloride, are disclosed. The method includes reacting (2S,4S)-2-(4-methyl-2,5-dioxo-oxazolidin-3-yl)-4-phenyl-butyric acid ethyl ester with (3S)-1,2,3,4-tetrahydro-isoquinoline-3-carboxylic acid tert-butyl ester to yield quinapril tert-butyl ester, which is subsequently reacted with an acid to yield quinapril or an acid addition salt of quinapril.

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