InChI=1S/C24H26O4/c1-3-5-13-19-23-15-9-8-14-22(23,21(26)27-19)18(10-4-2)24(23)17-12-7-6-11-16(17)20(25)28-24/h6-8,11-14,18H,3-5,9-10,15H2,1-2H3/b19-13-/t18-,22+,23-,24+/m1/s1