InChI=1/C18H16O5/c1-2-5-11-14-15(18-12(22-11)8-13(19)23-18)17(21)10-7-4-3-6-9(10)16(14)20/h3-4,6-7,11-12,18H,2,5,8H2,1H3/t11-,12+,18-/m0/s1 912A1C7CA02D3D19