Four new 2-(2-phenylethyl)chromone derivatives from withered wood of Aquilaria sinensis

Abstract

Four new chromone derivatives, 5-hydroxy-6-methoxy-2-(2-phenylethyl) chromone (1), 6-hydroxy-2-(2-hydroxy-2-phenylethyl)chromone (2), 8-chloro-2-(2-phenylethyl)-5,6,7-trihydroxy-5,6,7,8-tetrahydrochromone (3), 6,7-dihydroxy-2-(2-phenylethyl)-5,6,7,8-tetrahydrochromone (4) were isolated from the MeOH extract of withered wood of Aquilaria sinensis, together with seven known constituents of agarwood. © 2003 Pharmaceutical Society of Japan.