Abstract
One undescribed 6,7-secofusicoccane-type diterpene, albifolione (1), and one new aromadendrane-type sesquiterpenoid ketone, methyl 2-oxoaromadendra-1(10),3-dien-12-oate (2), along with four known compounds, δ-cuparenol (3), fusicoauritone (4), chiloscyphenols A and B (5 and 6, resp.), were isolated from the liverwort Bazzania albifolia Horik. The structures and relative configurations of 1 and 2 were established unequivocally on the basis of spectroscopic data analysis. Preliminary bioassay revealed that compound 5 showed quite strong cytotoxicity against the human tumor cell line MCF-7, with an IC(50) value of 5.6 μM.
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