3,4,4-Triethyl-1,2,3,3a,4,5-hexahydrocanthin-6-one hydrochloride 6H-Indolo(3,2,1-de)(1,5)naphthyridin-6-one, 1,2,3,3a,4,5-hexahydro-3,4,4-triethyl-, monohydrochloride 94831-78-4