InChI=1S/C16H24O11/c1-7(12(20)21)5-3-4-6-16(2,25)15(24)27-14-10(19)8(17)9(18)11(26-14)13(22)23/h3-4,7-11,14,17-19,25H,5-6H2,1-2H3,(H,20,21)(H,22,23)/b4-3+