InChI=1S/C20H32O4/c21-18-13-11-9-7-5-3-1-2-4-6-8-10-12-15-19(22)16-14-17-20(23)24/h2-5,8,10,12,15,19,21-22H,1,6-7,9,11,13-14,16-18H2,(H,23,24)/b4-2+,5-3+,10-8+,15-12+