InChI=1S/C15H24O7/c1-2-3-4-5-6-7-8-9-21-15-12(18)10(16)11(17)13(22-15)14(19)20/h5-8,10-13,15-18H,2-4,9H2,1H3,(H,19,20)/b6-5+,8-7+