Two New Phenylethanoid Glycosides from Callicarpa longissima

Abstract Two new phenylethanoid glycosides, longissimosides A and B (1 and 2, resp.), together with eight structurally related known compounds, were isolated from the EtOH extract of leaves and stems of Callicarpa longissima (Hemsl.) Merr. The structures of 1 and 2 were elucidated as 2‐(3,4‐dihydroxyphenyl)ethyl O‐(α‐L‐rhamnopyranosyl)‐(1→3)‐O‐(2‐O‐syringoyl‐β‐D‐xylopyranosyl)‐(1→6)‐ 4‐O‐[(E)‐caffeoyl]‐β‐D‐glucopyranoside (1) and 2‐(3‐hydroxy‐4‐methoxyphenyl)ethyl O‐(α‐L‐rhamnopyranosyl)‐(1→3)‐O‐(β‐D‐apiofuranosyl)‐(1→6)‐4‐O‐[(E)‐isoferuloyl]‐β‐D‐glucopyranoside (2) on the basis of spectroscopic data and acid hydrolysis.