InChI=1/C20H23NO4/c1-11-7-5-6-8-12(11)15-16-13(22)9-20(2,3)10-14(16)25-18(21)17(15)19(23)24-4/h5-8,15H,9-10,21H2,1-4H3/t15-/m1/s1 8A82DD432F604002