InChI=1S/C18H22O10/c1-4-5-9-6-7-10(26-8(2)19)15(25-3)14(9)27-18-13(22)11(20)12(21)16(28-18)17(23)24/h4-7,11-13,16,18,20-22H,1-3H3,(H,23,24)/b5-4-