InChI=1S/C22H25NO4/c1-23-16-12-18(24)20(21(25)14-8-4-2-5-9-14)17(23)13-19(16)27-22(26)15-10-6-3-7-11-15/h2-11,16-21,24-25H,12-13H2,1H3