1'-methyl-1',3',4',4a',5',12a'-hexahydro-2'H-spiro[1,3-dithiane-2,6'-indolo[1,2-a][1,8]naphthyridine] InChI=1/C19H24N2S2/c1-20-9-4-7-15-13-19(22-10-5-11-23-19)17-12-14-6-2-3-8-16(14)21(17)18(15)20/h2-3,6,8,12,15,18H,4-5,7,9-11,13H2,1H spiro[1,3-dithiane-2,6'(2'H)-indolo[1,2-a][1,8]naphthyridine], 1',3',4',4'a,5',12'a-hexahydro-1'-methyl-