N-(3-Fluoro-benzo-yl)-N',N''-bis-(4-methyl-phen-yl)phospho-ric triamide.

In the title compound, C(21)H(21)FN(3)O(2)P, the NH and P(=O) groups of the C(=O)NHP(=O) fragment are in a syn arrangement with respect to each other, as are the two amide H atoms of the two CH(3)-4-C(6)H(4)-NH moieties. In the crystal, mol-ecules are linked through N-H⋯O(=P) and N-H⋯O(=C) hydrogen bonds, forming R(2) (2)(8) and R(2) (2)(12) rings, which are arranged in chains parallel to [010].