951661-81-7 Usage
Description
Tadalafil iMpurity D, also known as (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 used to treat erectile dysfunction.
Uses
Used in Pharmaceutical Industry:
Tadalafil iMpurity D is used as a reference material for quality control and analytical testing in the pharmaceutical industry. It helps ensure the purity and safety of Tadalafil, the active ingredient in medications for 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.
