InChI=1S/C20H21ClN4O3/c1-3-28-19(26)9-11-25(17-6-4-5-10-22-17)20(27)14-7-8-16-15(12-14)23-18(13-21)24(16)2/h4-8,10,12H,3,9,11,13H2,1-2H3