1H-2-benzopyran-1-one, 4-[2-(acetyloxy)-1-hydroxyethyl]-8-hydroxy- 2-hydroxy-2-(8-hydroxy-1-oxo-1H-isochromen-4-yl)ethyl acetate InChI=1/C13H12O6/c1-7(14)18-6-11(16)9-5-19-13(17)12-8(9)3-2-4-10(12)15/h2-5,11,15-16H,6H2,1H