InChI=1S/C20H36/c1-3-5-7-9-11-13-15-17-19-20-18-16-14-12-10-8-6-4-2/h5,7,11,13,17,19H,3-4,6,8-10,12,14-16,18,20H2,1-2H3/b7-5-,13-11-,19-17-