Analgesic compounds from plants, extracts containing same and methods of preparation

摘要

Disclosed are compounds of formula (I) that are obtained from plants of the Barringtonia species which are derived from Barringtoside A and Barringtoside C as precursor compounds which especially have an arabinopyranosyl substituent at the 21 position which may optionally be further substituted with benzoyl, dibenzoyl, methyl butanoyl, methyl butyryl or tigloyl at the 3 or 4 positions. Alternatively at the 21 position there is provided tigloyl, benzoyl or dibenzoyl substituents.