RESUMEN
Objective: To study the chemical constituents in the whole plant of Pteris deltodon. Methods: Nine compounds were isolated from 95% ethanol extract in the whole plant of P. deltodon and purified by silica gel chromatography, Sephadex LH-20, and pre-HPLC, and their structures were identified on the basis of spectroscopic data and literatures. Results: Nine compounds were isolated and elucidated as β-sitosteol (1), (22E)-5α,8α-epidioxyergosta-6,22-dien-3β-ol (2), ent-kaur-16-ene-2β,15α-diol (3), cycloart-23-en-3β,25-diol (4), cycloart-25-en-3β,24-diol (5), emodin (6), 1,7-dihydroxyxanthone (7), ursolic acid (8), and ergosterol (9). Conclusion: All the compounds are for the first time isolated from P. deltodon; Compound 4 and 5 are cycloartanes first isolated from genus Pteris L.