Terpenoids from two Dicranopteris species

Two new compounds, (6S,13S)-6-{[beta-D-glucopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl]oxy}cleroda-3,14-dien-13-ol (1) and kadsuric acid 3-methyl ester (2), together with nine known compounds, (6S,13E)6-{[ beta-D-glucopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl]oxy}cleroda-3,13-dien-15-ol (3), (6S,13S)-6-[6-O-acetyl-beta-D-glucopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl]oxy}-13-{[alpha-L-rhamnopyranosyl-(1 --> 4)-beta-D-fucopyranosyl]oxy}cleroda-3,14-diene (4), (6S,13S)-6-{[6-O-beta-D-glucopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl]oxy)-13-([U-L-rhamnopyranosyl-(1-4)-p-D-fucopyranosyl]oxy]cleroda-3,14-diene (5), 15-hydroxydehydroabietic acid (6), 15-hydroxylabd-8(17)-en-19-oic acid (7), junicedric acid (8), (4 beta)-kaur-16-en-18-oic acid (9), (4 beta)-16-hydroxykauran-18-oic acid (10), and (4 beta,16 beta)-16-hydroxykauran-18-oic acid (11) were isolated from the fronds of Dicranopteris linearis or D. ampla. Their structures were established by extensive 1D- and 2D-NMR spectroscopy. Compounds 1 and 3-8 showed no anti-HIV activities.