Wulfenioidins A−C (1−3) with an unprecedented 6/5−5 tricyclic skeleton featuring unusual spiro [4.4] nonane were isolated from the whole plant of Orthosiphon wulfenioides. Their structures were elucidated by X-ray diffraction,... Click to show full abstract
Wulfenioidins A−C (1−3) with an unprecedented 6/5−5 tricyclic skeleton featuring unusual spiro [4.4] nonane were isolated from the whole plant of Orthosiphon wulfenioides. Their structures were elucidated by X-ray diffraction,...
               
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