Iridoid glucoside, (3R)-oct-1-en-3-ol glycosides, and phenylethanoid from the aerial parts of Caryopteris incana

Eleven compounds of interest were isolated from the aerial parts of Caryopteris incana, specifically a new acyl derivative (3) of 8-O-acetylharpagide, two new (3R)-oct-1-en-3-ol glycosides (5, 6), and 6-O-caffeoylphlinoside A (11) along with seven known compounds, 8-O-acetylharpagide (1), 6'-O-p-coumaroyl-8-O-acetylharpagide (2), (3R)-oct-1-en-3-ol (matsutake alcohol) O-alpha-l-arabinopyranosyl-(1aEuro(3) -> 6')-O-beta-d-glucopyranoside (4), apigenin 7-O-neohesperidinoside (7), 6'-O-caffeoylarbutin (8), and two phenylethanoids, leucosceptoside A (9) and phlinoside A (10). This paper deals with structural elucidation of the new compounds