Illigerones A and B,two new long-chain secobutanolides from Illigera henryi W. W. Sm.

Two new long-chain secobutanolides, illigerones A (1) and B (2), together with five known compounds, actinodaphnine (3), cryptodorine (4), β-sitosterol (5), daucosterol (6), and stigmasterol (7) were isolated from Illigera henryi W. W. Sm. The structures of 1 and 2 were identified by HRESIMS, EIMS, 1D/2D NMR, and electronic circular dichroism (ECD) spectra. Compound 1 exhibited the moderate cytotoxic activities against five tumour cells. This is the first report of secobutanolides isolated from plants of Hernandiaceae.     

云南贡山异叶苣苔属(苦苣苔科)一新种

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