6-hydroxy-1a-(3-hydroxy-4-methoxyphenyl)-4-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-((((2R,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)methyl)tetrahydro-2H-pyran-2-yl)oxy)-1aH-oxireno[2,3-b]chromen-7(7aH)-one