Chemical and chemotaxonomical studies of ferns. XXXVII. Chemical studies on the constituents of costa rican ferns.

Abstract

The constituents of five Costa Rican ferns of Preridaceae were investigated. The ferns and isolated compounds are as follows. Acrostichum aureum : quercetin 3-O-β-D-glucoside (I), ponasterone A (III). Neurocallis praestantissima : 2-deoxy-D-glucose (IV), 3, 6-anhydro-2-deoxy-D-glucose (V). Pteris podophylla : 6-(2-chloroethyl)-2 (S)-hydroxy-methyl-5, 7-dimethylindan-1-one (X), pterosin G (XI), kaempferol 3, 7-di-O-α-L-rhamnoside (II), apigenin 7-O-β-D-glucoside (VI), luteolin 7-O-β-D-glucoside (VII). Pteris livida : pterosin C (VIII), pterosin S (IX), 9-hydroxy-15-oxo-ent-kaur-16-en-19-oyl-β-D-glucoside (XII), 6β, 11β-dihydroxy-15-oxo-ent-kaur-16-en-19-oyl-β-D-glucoside (XIII), 6β, 9-dihydroxy-15-oxo-ent-kaur-16-en-19-oyl-β-D-glucoside (XIV), paniculoside III (XV), ptero-kaurene L1 (XVI), 11β-hydroxy-15-oxo-ent-kaur-16-en-19-oic acid (XIX). Pteris altissima : VII, XI, XII, XIII, XV. Among the above products, X, XII, XIII and XIV are new compounds and their structures were elucidated by chemical and physicochemical methods.