9-Hydroxy-9H-voacangine

Voacangine hydroxyindolenine

7-Hydroxy-1-dehydrovoacangine

9α-Hydroxy-9-hydro-16-dehydro-12-methoxyibogamine-18-carboxylic acid methyl ester

16,17-Didehydro-9,17-dihydro-9α-hydroxy-12-methoxyibogamine-18-carboxylic acid methyl ester