InChI=1S/C27H44O3/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-24-30-27(29)23-20-25-18-21-26(28)22-19-25/h18-23,28H,2-17,24H2,1H3/b23-20+