InChI=1S/C23H42O4/c1-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(25)19-23(26)20-27-21(2)24/h17-18,23,26H,3-16,19-20H2,1-2H3/b18-17+