c1c(c(cc2c1[nH]c(=O)c(=O)n2CP(=O)(O)O)N3CCOCC3)C(F)(F)F ZK1_263_3KGC [7-morpholino-2,3-dioxo-6-(trifluoromethyl)-4H-quinoxalin-1-yl]methylphosphonic acid