InChI=1S/C18H18O11/c1-27-14-6-4-5-28-8(6)3-2-7(14)10(19)9(17(23)24)15-12(21)11(20)13(22)16(29-15)18(25)26/h2-5,9,11-13,15-16,20-22H,1H3,(H,23,24)(H,25,26)