InChI=1S/C17H28O8/c18-10-8-6-4-2-1-3-5-7-9-11-24-17-14(21)12(19)13(20)15(25-17)16(22)23/h1-2,6,8,12-15,17-21H,3-5,7,9-11H2,(H,22,23)/b2-1-,8-6+