InChI=1/C19H17N5O4/c1-12-9-10-20-23(12)14-7-5-13(6-8-14)16(25)22-24-17(26)19(2,21-18(24)27)15-4-3-11-28-15/h3-11H,1-2H3,(H,21,27)(H,22,25)/t19-/m1/s1/f/h21-22H 53B2DD4C336D83DD