InChI=1S/C16H28O8/c1-7-4-5-8(16(2,3)22)9(6-7)23-15-12(19)10(17)11(18)13(24-15)14(20)21/h7-13,15,17-19,22H,4-6H2,1-3H3,(H,20,21)