Alalakine

22α-Ethyl-21-deoxy-19-hydroxy-15,16-dimethoxy-4,25-secoobscurinervan-21-oic acid γ-lactone

22α-Ethyl-19-hydroxy-15,16-dimethoxy-21-deoxy-4,25-secoobscurinervan-21-oic acid γ-lactone