InChI=1S/C16H22O11/c1-6(4-3-5-8(17)7(2)13(21)22)15(25)27-16-11(20)9(18)10(19)12(26-16)14(23)24/h3-5,7-12,16-20H,1-2H3,(H,21,22)(H,23,24)/b5-3+,6-4+