InChI=1S/C17H28O7/c1-2-3-4-5-6-7-8-9-10-11-23-17-14(20)12(18)13(19)15(24-17)16(21)22/h6-7,9-10,12-15,17-20H,2-5,8,11H2,1H3,(H,21,22)/b7-6-,10-9+