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In the title mol­ecule, C17H12F2O3, the dihedral angle between the benzene rings is 8.6 (2)°. In the crystal, two pairs of O—H...O hydrogen bonds connect the mol­ecules into inversion dimers. In addition, weak C—H...F hydrogen bonds link the dimers into a two-dimensional network parallel to (10-4). The carbonyl O atom is an acceptor for two weak intra­molecular hydrogen bonds.

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The asymmetric unit of the title compound, C22H30NO5P, contains two independent mol­ecules in which the dihedral angles between the benzene rings are 82.0 (2) and 78.4 (2)°. In the crystal, each mol­ecule forms an inversion dimer via a pair of N—H...O(=P) hydrogen bonds.

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In the title compound, C18H21N2O6P, the dihedral angle between the benzene and phenyl rings is 85.1 (2)°. In the crystal, mol­ecules are linked via pairs of N—H...O(=P) hydrogen bonds, forming inversion dimers with graph-set notation R22(10). One of the ethyl groups is disordered over two sets of sites, with occupancies 0.746 (11) and 0.254 (11).
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