InChI=1S/C18H32O4/c1-2-3-4-7-10-13-16(19)17(20)14-11-8-5-6-9-12-15-18(21)22/h10-11,13-14,16-17,19-20H,2-9,12,15H2,1H3,(H,21,22)/b13-10-,14-11+