InChI=1S/C22H34O7/c1-5-8-16(12-7-11-15(4)10-6-9-14(2)3)13-28-22-19(25)17(23)18(24)20(29-22)21(26)27/h5,8-9,11,17-20,22-25H,1,6-7,10,12-13H2,2-4H3,(H,26,27)/b15-11-,16-8-