SECOIRIDOID GLUCOSIDES ESTERIFIED WITH A PHENOLIC GLUCOSIDE FROM ALSTONIA MACROPHYLLA

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 1D and 2D NMR spectroscopic data. These compounds were commonly characterized as esters of secoxyloganin with a phenolic glucoside.

Automated summary

Eleven novel secoiridoid glucosides were isolated from the dried twigs of Alstonia macrophylla, along with seventeen known compounds. The new compounds were identified as esters of secoxyloganin with a phenolic glucoside. These structures were determined based on 1D and 2D NMR spectroscopic data.