Two New C(20)‐Oxygenated ent ‐Kaurene Diterpenoids from Isodon henryi

Two new C(20)‐oxygenated ent ‐kaurene diterpenoids, taibaihenryiins A ( 1 ) and B ( 2 ), along with five known compounds, shikokianin ( 3 ), longikaurin D, 2 α ‐hydroxyursolic acid, longikaurin F, and lasiodin, were isolated from the EtOH extract of the leaves and tender branches of Isodon henryi (H emsl .) K udo . The structures of the new compounds were determined as 11 α ‐acetoxy‐7,20‐epoxy‐1 α ,6 β ,7 β ‐trihydroxy‐ ent ‐kaur‐16‐en‐15‐one ( 1 ) and 7,20‐epoxy‐3 β ,6 β ,7 β ,11 α ‐tetrahydroxy‐ ent ‐kaur‐16‐en‐15‐one ( 2 ) on the basis of detailed spectroscopic analyses.