InChI=1S/C15H16O11/c16-6-3-5(1-2-8(18)19)4-7(17)12(6)25-15-11(22)9(20)10(21)13(26-15)14(23)24/h1-4,9-11,13,15-17,20-22H,(H,18,19)(H,23,24)/b2-1+