InChI=1/C20H26N2S2/c1-3-19-13-22(2)10-9-16(19)20(23-11-6-12-24-20)18-17(19)14-7-4-5-8-15(14)21-18/h4-5,7-8,16,21H,3,6,9-13H2,1-2H3/t16-,19+/m0/s rel-(4a'R,10c'S)-10c'-ethyl-2'-methyl-2',3',4',4a',6',10c'-hexahydro-1'H-spiro[1,3-dithiane-2,5'-pyrido[3',4':3,4]cyclopenta[1,2-b]indole] spiro[1,3-dithiane-2,5'(1'H)-pyrido[3',4':3,4]cyclopent[1,2-b]indole], 10'c-ethyl-2',3',4',4'a,6',10'c-hexahydro-2'-methyl-, (4a'S,10c'R)-