Hydroquinone diglycoside acyl esters from the leaves of Myrsine seguinii

From the leaves of Myrsine seguinii, five phenolic glycosides, seguinosides G–K, were isolated. Their structures were elucidated as comprising tiglic, furoic, menthiafolic and 2-E-hexenoic acid esters attached to the 5″-hydroxyl group of seguinoside A [=arbutin(2′-1″)apiofuranoside], and a 3-methoxy-4-hydroxybenzoic acid ester linked to the 5″-hydroxyl group of methoxyseguinoside A.