SECOIRIDOID GLUCOSIDES ESTERIFIED WITH A PHENOLIC GLUCOSIDE FROM ALSTONIA MACROPHYLLA

摘要

Eleven novel secoiridoid glucosides,O-methylfrachinoside(1)and alstomacrosides A-J(2-11)were isolated,together with seventeen known compounds,from the dried twigs of Alstonia macrophylla.The structures of the new compounds were established on the basis of ID and 2D NMR spectroscopic data.These compounds were commonly characterized as esters of secoxyloganin with a phenolic glucoside.