InChI=1S/C16H26O8/c1-15(2)7-4-5-16(3,24-15)6-8(7)22-14-11(19)9(17)10(18)12(23-14)13(20)21/h7-12,14,17-19H,4-6H2,1-3H3,(H,20,21)