(2R,3R,3aS,8bS)-7-Methoxy-4,8b-dimethyl-2,3,4,8b-tetrahydro-1H-cyclopenta[b]indole-2,3,3a-triol

(3aR,3bS,8bS,9aR)-7-methoxy-2,2,8b-trimethyl-4,8b,9,9a-tetrahydro-[1,3]dioxolo[4',5':4,5]cyclopenta[1,2-b]indol-3b(3aH)-ol

(-)-(3S)-1,3-dimethyl-5-methoxyoxindole-3-acetic acid