Terpenoids from Two <i>Dicranopteris</i> Species

Abstract

Abstract Two new compounds, (6 S ,13 S )‐6‐{[ β ‐ D ‐glucopyranosyl‐(1→4)‐ α ‐ L ‐rhamnopyranosyl]oxy}cleroda‐3,14‐dien‐13‐ol ( 1 ) and kadsuric acid 3‐methyl ester ( 2 ), together with nine known compounds, (6 S ,13 E )‐6‐{[ β ‐ D ‐glucopyranosyl‐(1→4)‐ α ‐ L ‐rhamnopyranosyl]oxy}cleroda‐3,13‐dien‐15‐ol ( 3 ), (6 S ,13 S )‐6‐[6‐ O ‐acetyl‐ β ‐ D ‐glucopyranosyl‐(1→4)‐ α ‐ L ‐rhamnopyranosyl]oxy}‐13‐{[ α ‐ L ‐rhamnopyranosyl‐(1→4)‐ β ‐ D ‐fucopyranosyl]oxy}cleroda‐3,14‐diene ( 4 ), (6 S ,13 S )‐6‐{[6‐ O ‐ β ‐ D ‐glucopyranosyl‐(1→4)‐ α ‐ L ‐rhamnopyranosyl]oxy}‐13‐{[ α ‐ L ‐rhamnopyranosyl‐(1→4)‐ β ‐ 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 β )‐kaur‐16‐en‐18‐oic acid ( 9 ), (4 β )‐16‐hydroxykauran‐18‐oic acid ( 10 ), and (4 β ,16 β )‐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.