InChI=1S/C21H25N3O4/c1-12(2)7-8-21(14-6-5-13(25)10-15(14)23-20(21)28)11-16-19(27)24-9-3-4-17(24)18(26)22-16/h5-7,10,16-17,25H,3-4,8-9,11H2,1-2H3,(H,22,26)(H,23,28)/t16-,17-,21-/m0/s1