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99522-55-1

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99522-55-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99522-55-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,2 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 99522-55:
(7*9)+(6*9)+(5*5)+(4*2)+(3*2)+(2*5)+(1*5)=171
171 % 10 = 1
So 99522-55-1 is a valid CAS Registry Number.

99522-55-1Relevant articles and documents

DIHYDROPYRIDINE CALCIUM ANTAGONIST COMPOUNDS, PREPARATION METHODS AND MEDICAL USES THEREOF

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Page/Page column 15, (2010/12/01)

A dihydropyridine (DHP) calcium antagonist compound and its preparation method and medical use are related to preparation methods of compounds of general formulas (I) and (II) as shown below and their pharmaceutical salts and applications for treating cardiovascular diseases, and R1 represents a substituted or unsubstituted heterocyclic, aromatic ring or aralkyl group, and the substituent may be C1-C4 alkyl, C1-C4 alkoxyl, halogen, cyano, trifluoromethyl, trifluoromethoxyl, methylthio, nitro, amino or hydroxyl group; R2 represents a C1-C8 alkyl group; R3 and R4 are the same or different, and each represents a hydrogen, halogen, cyano, trifluoromethyl, trifluoromethoxyl, methylthio, nitro or amino group or a C1-C4 alkyl, C1-C4 alkoxyl, C1-C4 alkenyl, or C1-C4 alkinyl group; R5 and R6 are the same or different, and each represents a C1-C4 alkyl group; X represents O, S or a single bond; m=0-6, n=1-6, and m and n are the same or different.

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