InChI=1S/C18H18O10/c1-24-14-7-2-3-10(20)27-16(7)17(15-8(14)4-5-25-15)28-18-13(23)12(22)11(21)9(6-19)26-18/h2-5,9,11-13,18-19,21-23H,6H2,1H3