InChI=1/C21H26N4O3/c1-14(2)19-22-23-20(28-19)15-8-10-24(11-9-15)21(27)16-12-18(26)25(13-16)17-6-4-3-5-7-17/h3-7,14-16H,8-13H2,1-2H3/t16-/m0/s1 330DB7C086C7EF5E