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Sumatriptan EP Impurity H Catalogue No. - VL950008 CAS No. - 1391052-59-7 Molecular Formula - C27H37N5O2S Molecular Weight - 495.69 IUPAC Name - 1-(3-(2-(dimethylamino)ethyl)-1-((3-(2-(dimethylamino)ethyl)-1H-indol-5-yl)methyl)-1H-indol-5-yl)-N-methylmethanesulfonamide