5,6-Dihydro-7H-benzo(c)carbazole-10-carboxylic acid 2-(diethylamino)ethyl ester hydrochloride 64709-50-8 7H-Benzo(c)carbazole-10-carboxylic acid, 5,6-dihydro-, 2-(diethylamino)ethyl ester, hydrochloride