β-​D-​Glucopyranoside, (1aS,​1bS,​2S,​5aR,​6S,​6aS)​-​1a,​1b,​2,​5a,​6,​6a-​hexahydro-​6-​[[(2E)​-​3-​(3-​hydroxy-​4-​methoxyphenyl)​-​1-​oxo-​2-​propen-​1-​yl]​oxy]​-​1a-​(hydroxymethyl)​oxireno[4,​5]​cyclopenta[1,​2-​c]​pyran-​2-​yl