InChI=1S/C20H23NO4/c1-21-10-14-12-8-17(24-3)18(25-4)9-13(12)15(21)7-11-5-6-16(23-2)20(22)19(11)14/h5-6,8-9,14-15,22H,7,10H2,1-4H3/t14-,15?/m1/s1