InChI=1/C19H16N4O4/c24-14(22-11-3-4-13-12(6-11)17(25)21-8-20-13)7-23-18(26)15-9-1-2-10(5-9)16(15)19(23)27/h1-4,6,8-10,15-16H,5,7H2,(H,22,24)(H,20,21,25)/t9-,10+,15-,16+/f/h21-22H 2F42BE35E7C8B5E7