InChI=1S/C18H30O4/c1-4-5-6-7-8-9-10-11-14-21-17(19)12-13-18(20)22-15-16(2)3/h8-9,12-13,16H,4-7,10-11,14-15H2,1-3H3/b9-8+,13-12+