InChI=1S/C21H23N3O3/c1-18(2)14-10-19-8-5-9-24(19)17(27)21(14,23-15(19)25)11-20(18)12-6-3-4-7-13(12)22-16(20)26/h3-4,6-7,14H,5,8-11H2,1-2H3,(H,22,26)(H,23,25)/t14-,19-,20+,21-/m1/s1