InChI=1S/C15H24O8/c1-3-4-5-9(6-8(2)7-16)22-15-12(19)10(17)11(18)13(23-15)14(20)21/h6-7,9-13,15,17-19H,3-5H2,1-2H3,(H,20,21)/b8-6-