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Figure 2 Intramolecular H⋯π and N⋯P interactions in the structure of I (shown as dashed lines). All the hydrogen atoms, except for those involved in hydrogen bonds, were omitted for clarity. Cg2, Cg3, and Cg4 are the centroids of the benzene rings C1—C6, C13—C18, and C19—C24, respectively. Symmetry codes: (i) −x + 2, −y + 1, −z; (ii) −x + , y − , −z + . |