InChI=1S/C20H16O5/c21-12-7-8-14(23)19-18(12)13(22)9-10-20(19)24-15-5-1-3-11-4-2-6-16(25-20)17(11)15/h1-6,9-10,14,19,22-23H,7-8H2/t14-,19-/m1/s1