(-)-(6S,10S)-5,6,7,8,10,11-hexahydro-3-methoxy-5-methyl-6,10-imino-9H-cyclooct[b]indol-9-one

(6S,10S)-5,6,7,8,10,11-hexahydro-12-(Z-2'-iodo-2'-butenyl)-3-methoxy-5-methyl-6,10-iminocyclooct[b]indol-9-one

11-methoxy-1-methyl-17-norsarpagan-16-one

(+)-Na-methyl-16-epigardneral

16-epi-Na-methyl-17-hydroxygardnerine