InChI=1S/C20H28O4/c1-11(2)12-5-6-14-13(9-12)15(21)10-16-19(3,18(23)24)8-7-17(22)20(14,16)4/h5-6,9,11,15-17,21-22H,7-8,10H2,1-4H3,(H,23,24)/t15-,16-,17+,19+,20+/m0/s1