InChI=1S/C16H18O11/c1-25-8-5-7(17)6(2-3-10(18)19)4-9(8)26-16-13(22)11(20)12(21)14(27-16)15(23)24/h2-5,11-14,16-17,20-22H,1H3,(H,18,19)(H,23,24)