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553671-80-0

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553671-80-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 553671-80-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,3,6,7 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 553671-80:
(8*5)+(7*5)+(6*3)+(5*6)+(4*7)+(3*1)+(2*8)+(1*0)=170
170 % 10 = 0
So 553671-80-0 is a valid CAS Registry Number.

553671-80-0Relevant articles and documents

PYRIDINYLPYRAZOLOPYRIMIDINONE DERIVATIVES AS PDE 7 INHIBITORS

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Page 26, (2008/06/13)

To provide the compounds inhibiting PDE 7 selectively, and therefore, enhance cellular cAMP level. Consequently, the compound is useful for treating various kinds of disease such as allergic disease, inflammatory disease or immunologic disease. The compound is pyridinylpyrazolopyrimidinone compound represented by the following formula (IA) or (IB): especially, R1 is cyclohexyl or cycloheptyl group, R2 is methyl; R3 is a group: -NR5R6 or -S(O)0-2R8; hydrogen atom; nitro group; cyano group; a halogen atom; heteroaryl group; and R4 is methoxy or ethoxy group.

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