InChI=1S/C19H26O7/c1-9(17(23)24)5-13-16(19(13,3)4)18(25)26-15-7-14(22)12(10(15)2)6-11(21)8-20/h5,11,13,15-16,20-21H,6-8H2,1-4H3,(H,23,24)/b9-5-/t11?,13-,15+,16+/m1/s1