InChI=1S/C16H24O11/c1-7(4-2-3-5-8(6-17)13(21)22)15(25)27-16-11(20)9(18)10(19)12(26-16)14(23)24/h2-3,7-12,16-20H,4-6H2,1H3,(H,21,22)(H,23,24)/b3-2+