951661-81-7 Usage
Uses
(1R,3R)-1-(1,3-Benzodioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-N-methyl-1H-pyrido[3,4-b]indole-3-carboxamide is an impurity of Tadalafil (T004500), a phosphodiesterase 5 inhibitor that is used to treat erectile dysfunction.
Check Digit Verification of cas no
The CAS Registry Mumber 951661-81-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,1,6,6 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 951661-81:
(8*9)+(7*5)+(6*1)+(5*6)+(4*6)+(3*1)+(2*8)+(1*1)=187
187 % 10 = 7
So 951661-81-7 is a valid CAS Registry Number.
951661-81-7Relevant articles and documents
PROCESS FOR THE PREPARATION OF TADALAFIL
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Page/Page column 17-18, (2008/06/13)
The present invention provides novel intermediates of tadalafil and processes for their preparation. The present invention also provides for the preparation of tadalafil or a pharmaceutically acceptable salt or solvate thereof using the intermediates.
