InChI=1/C20H19N3O5/c1-3-28-19(26)16-17(11-8-9-14(24)15(10-11)27-2)23-13-7-5-4-6-12(13)21-20(23)22-18(16)25/h4-10,16-17,24H,3H2,1-2H3,(H,21,22,25)/t16-,17-/m1/s1/f/h21H B50176C4018C18C3