InChI=1S/C20H16O5/c21-11-5-1-3-8-14-10(7-13(23)15(8)11)18-19(24)16-9(17(14)20(18)25)4-2-6-12(16)22/h1-6,10,14,17-18,20-22,25H,7H2/t10-,14+,17+,18+,20-/m0/s1