3-(Di-n-butylamino)-1-propyl 1,2,3,4-tetrahydro-6-carbazolylcarboxylate hydrochloride 5,6,7,8-Tetrahydrocarbazole-3-carboxylic acid 3-(dibutylamino)propyl ester hydrochloride Carbazole-3-carboxylic acid, 5,6,7,8-tetrahydro-, 3-(dibutylamino)propyl ester, hydrochloride FE5840000