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Tadalafil
C22H19N3O4 389.40
 Pyrazino[1′,2′:1,6]pyrido[3,4-b]indole-1,4-dione, 6-(1,3-benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-methyl-, (6R-12aR)-;
 (6R,12aR)-2,3,6,7,12,12a-Hexahydro-2-methyl-6-[3,4-(methylenedioxy)phenyl] pyrazino[1′,2′:1,6]pyrido[3,4-b]indole-1,4-dione [171596-29-5]

DEFINITION

Tadalafil contains NLT 97.5% and NMT 102.5% of tadalafil (C22H19N3O4), calculated on the dried basis.

USP REFERENCE STANDARDS FOR PURCHASE

USP Tadalafil RS
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