InChI=1S/C20H28O4/c1-18-9-15(22)17-13(5-7-24-17)14(18)4-6-19-8-12(2-3-16(18)19)20(23,10-19)11-21/h5,7,12,14-16,21-23H,2-4,6,8-11H2,1H3/t12?,14?,15?,16?,18-,19+,20+/m1/s1