InChI=1S/C18H30O5/c1-2-13(19)10-11-15-14(16(20)12-17(15)21)8-6-4-3-5-7-9-18(22)23/h10-11,13-15,17,19,21H,2-9,12H2,1H3,(H,22,23)/b11-10+