InChI=1/C20H19N3O4/c1-12-19(25)22-16-11-14(7-8-17(16)27-12)21-20(26)13-4-2-5-15(10-13)23-9-3-6-18(23)24/h2,4-5,7-8,10-12H,3,6,9H2,1H3,(H,21,26)(H,22,25)/t12-/m1/s1/f/h21-22H 6D083CB3098142E9