5H-Benzo(c)carbazole-8-carboxylic acid, 6,7-dihydro-, 2-(dimethylamino)ethyl ester, hydrochloride 6,7-Dihydro-5H-benzo(c)carbazole-8-carboxylic acid 2-(dimethylamino)ethyl ester hydrochloride 64709-47-3