InChI=1S/C19H23N3O6/c1-11-15(18(23)27-4)17(13-6-5-7-14(10-13)22(25)26)16(12(2)21-11)19(24)28-9-8-20-3/h5-7,10,17,20-21H,8-9H2,1-4H3