1-Benzyl-3-piperidone hydrochloride hydrate50606-58-130 % similar Ethyl 2-(dibenzylamino)acetate77385-90-130 % similar 3-[(Dimethylamino)methyl]-1,2,3,9-tetrahydro-9-methyl-4H-carbazol-4-one hydrochloride99614-70-730 % similar