Four new 3,4-seco-cycloartanes, gardenoins A-D (1-4), together with the known compound secaubryenol (5), were isolated from the exudate of Gardenia tubifera. The structures of 1-4 were elucidated on the basis of spectroscopic analysis. The cytotoxic activity of compounds 1-4 was evaluated against five human tumor cell lines.
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Nuanyai et al. (2009) studied this question.
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