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