InChI=1S/C18H22O10/c1-9(19)27-11-6-5-10(8-12(11)25-2)4-3-7-26-18-15(22)13(20)14(21)16(28-18)17(23)24/h3-6,8,13-16,18,20-22H,7H2,1-2H3,(H,23,24)/b4-3-