InChI=1S/C22H24O4/c1-24-18-9-5-16-7-11-22(26-3)20(13-16)19-12-15(4-8-17(23)14-18)6-10-21(19)25-2/h6-7,10-14H,4-5,8-9H2,1-3H3/b18-14-