Two novel migrated pimarane-type diterpenes, neoorthosiphols A and B, from the leaves of Orthosiphon aristatus (Lamiaceae)

Abstract

Two new migrated pimarane-type diterpenes called neoorthosiphols A and B have been isolated from a water decoction of the leaves of Orthosiphon aristatus (Lamiaceae) cultivated in Java, Indonesia. Their chemical structures have been elucidated on the basis of physicochemical evidence.