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Paper | Special issue | Vol 101, No. 1, 2020, pp.186-194
Published online, 24th July, 2019
DOI: 10.3987/COM-19-S(F)10
Iridoid Glucosides from Linociera sangda

Yukiko Takenaka, Naoaki Okazaki, Toyoyuki Nishi, Naotaka Nagakura, and Takao Tanahashi*

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

Abstract

A phytochemical investigation of the aerial parts of Linociera sangda led to the isolation of three new iridoid glucosides (13), together with nine known iridoid glucosides and a flavonoid glycoside, nicotiflorin. The structures of the new compounds were elucidated spectroscopically. Compounds 13 are members of a rare group of iridoids with a spirolactone ring, and compound 3 is the first instance of an adduct of iridoid glucoside and flavonoid glycoside.