InChI=1S/C24H48O2/c1-2-3-4-18-21-24(26)22-19-16-14-12-10-8-6-5-7-9-11-13-15-17-20-23-25/h4,18,24-26H,2-3,5-17,19-23H2,1H3/b18-4+