1H-2-benzopyran-1-one, 3-(2-hydroxy-4-oxopentyl)-6,8-dimethoxy- 3-(2-hydroxy-4-oxopentyl)-6,8-dimethoxy-1H-isochromen-1-one InChI=1/C16H18O6/c1-9(17)4-11(18)7-13-6-10-5-12(20-2)8-14(21-3)15(10)16(19)22-13/h5-6,8,11,18H,4,7H2,1-3H