Synonyms: 4H-Indol-4-one,3-ethyl-1,5,6,7-tetrahydro-2-methyl-5-(1-piperidinylmethyl)-, monohydrochloride(9CI); Indol-4(5H)-one, 3-ethyl-6,7-dihydro-2-methyl-5-(piperidinomethyl)-,monohydrochloride (8CI);3-Ethyl-6,7-dihydro-2-methyl-5-piperidinomethylindole-4-(5H)-one hydrochloride