InChI=1/C21H28N4O2/c1-3-25(4-2)19-13-12-17(20(26)15-19)16-23-24-21(27)11-8-14-22-18-9-6-5-7-10-18/h5-7,9-10,12-13,15-16,22,26H,3-4,8,11,14H2,1-2H3,(H,24,27)/b23-16+/f/h24H 5B4DAA8D132BE1C4