Three new triterpenoids, 23-hydroxyfernene (1), glaucanol A (2) and filicenoic acid (3), were isolated from the leaves of Adiantum pedatum L., and their structures were elucidated on the basis of spectral data and chemical correlations with known compounds. Additional data are presented for previously reported compounds (4-15) and the isolation and identification of six known compounds (16-21) from the same source are also described.
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Shiojima et al. (1993) studied this question.