From the leaves of Adiantum edgeworthii, two new triterpenoids, 19α-hydroxyadiantone (1) and fern-9(11)-en-25-oic acid (2) were isolated, together with fern-9(11)-ene (3), fern-7-ene (4), neohop-12-ene (5), filic-3-ene (6), hop-22(29)-ene (7), adiantone (8), hydroxyhopane (9) and zeorin (10). The structures of 1 and 2 were elucidated on the basis of spectral data and chemical correlations with a known compound.
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Shiojima et al. (1994) studied this question.