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A series of iridoid glycosides were isolated from the leaves of Lasianthus verticillatus (Lour.) Merr., belonging to family Rubiaceae. A new iridoid glycoside, lasianoside F ( 1 ), and three new bis-iridoid glycosides, lasianosides G-I ( 2 - 4 ), together with four known compounds ( 5 - 8 ) were isolated. The structures were established by spectroscopic methods, including 1D and 2D NMR experiments ( 1 H, 13 C, DEPT, COSY, HSQC, HMBC, and NOESY) in combination with HR-ESI-MS and CD spectra.

Lasianosides F–I: A New Iridoid and Three New Bis-Iridoid Glycosides from the Leaves of Lasianthus verticillatus (Lour.) Merr.