InChI=1S/C15H22O6/c1-2-3-4-5-6-7-9-10(8-16)13-14(12(18)11(9)17)21-15(19)20-13/h6-7,11-14,16-18H,2-5,8H2,1H3/b7-6+/t11-,12+,13-,14+/m1/s1