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The title compound, C21H17N3O5·C3H7NO, exists in an E conformation with respect to the azomethine double bond of the hydrazide mol­ecule. This mol­ecule contains an intra­molecular O—H...N hydrogen bond, while an inter­molecular N—H...O hydrogen bond links the hydrazide to the formamide mol­ecule of solvation. Nonclassical C—H...O inter­molecular hydrogen bonds build up a supra­molecular architecture, together with two C—H...π inter­actions and a weak π–π inter­action, with a centroid–centroid distance of 3.650 (13) Å.

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In the title compound, C24H18S, the dihedral angles between the phenyl ring and the two benzene rings of the anthracene moiety are 51.92 (9) and 68.24 (9)°, whereas the dihedral angle between the two anthracene benzene rings is 120.13 (9)°. The three non-aromatic six-membered rings are in boat conformations, while the five-membered ring has an envelope conformation on the S atom. In the crystal, there are three C—H...π inter­actions, which facilitate the packing of the mol­ecules.
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