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Paper | Regular issue | Vol 102, No. 5, 2021, pp.886-899
Published online, 30th March, 2021
DOI: 10.3987/COM-21-14421
Secoiridoid Glucosides Esterified with a Phenolic Glucoside from Alstonia macrophylla

Atsuko Itoh, Eri Kawaguchi, Sayo Nishio, Kaori Tani, Misaki Uchigaki, Marina Nakamura, Toru Akita, Toyoyuki Nishi, and Takao Tanahashi*

*Kobe Pharmaceutical University, 4-19-1, Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan.


Eleven novel secoiridoid glucosides, O-methylfrachinoside (1) and alstomacrosides A–J (211) 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.