5,6-Dihydro-7H-benzo(c)carbazole-9-carboxylic acid 2-(diethylamino)ethyl ester hydrochloride 64709-49-5 7H-Benzo(c)carbazole-9-carboxylic acid, 5,6-dihydro-, 2-(diethylamino)ethyl ester, hydrochloride