Pterosin sesquiterpenoids and ent-kaurane diterpenoids from Pteris dactylina Hook

Phytochemical research on Pteris dactylina Hook. afforded fourteen compounds including eight pterosin sesquiterpenoids (1-8) and six ent-kaurane diterpenoids (9-14). Compounds were identified as dehydropterosin B (1), (2R)-acetylpterosin B (2), (2R)-pterosin B (3), granuloinden B (4), (2S,3S)-acetylpterosin C (5), (2S,3S)norpterosin C (6), (3R)-pterosin X (7), (2R)-pteroside B (8), ent-3 beta-hydroxy-kaur-16-ene (9), ent-3 beta,19-dihydroxy-kaur-16-ene (10), 2 beta,15 alpha-dihydroxy-ent-kaur-16-ene (11), ent-9 alpha-hydroxy-15-oxo-16-kauren-19-oic acid (12), 2 beta,6 beta,15 alpha-trihydroxy-ent-kaur-16-ene (13) and ent-9 alpha,16 alpha,17-trihydroxy-15-oxokauran-19-oic acid (14) based on NMR, MS, ORD and CD data. All compounds were first isolated from P. dactylina, and compounds 4 and 8 were first discovered from the genus Pteris as well as the family Pteridaceae. Moreover, the chemotaxonomic significance of the isolates was discussed.

Automated summary

Phytochemical research on Pteris dactylina Hook. led to the discovery of fourteen compounds, including eight pterosin sesquiterpenoids and six ent-kaurane diterpenoids. These compounds were identified based on various data, and all of them were isolated for the first time from P. dactylina. Additionally, two compounds were also newly discovered from the genus Pteris and the family Pteridaceae. The chemotaxonomic significance of these isolates was discussed.