(organic chemistry) A glucoside, [(2~{S},3~{R},4~{S},5~{S},6~{R})-4,5-dihydroxy-6-(hydroxymethyl)-2-[2-[(1-hydroxy-6-oxocyclohex-2-ene-1-carbonyl)oxymethyl]phenoxy]oxan-3-yl] benzoate, present in the bark and leaves of several poplars