InChI=1S/C18H32O5/c1-2-3-4-5-6-9-12-15(19)18(23)16(20)13-10-7-8-11-14-17(21)22/h6,9,15,18-19,23H,2-5,7-8,10-14H2,1H3,(H,21,22)/b9-6+