InChI=1/C20H21N3O4/c24-19(14-6-2-1-3-7-14)21-22-20(25)23-11-5-9-16(23)15-8-4-10-17-18(15)27-13-12-26-17/h1-4,6-8,10,16H,5,9,11-13H2,(H,21,24)(H,22,25)/t16-/m1/s1/f/h21-22H 199FD9765834A182