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The title compound, C22H22FN3, exists as a zwitterion with the negative charge on the dicyano­methanide group and the positive charge on the pyridinium N atom. The mol­ecule adopts a Z conformation about the central C=C bond. The dihedral angle between the pyridinium and benzene rings is 65.65 (5)°. Weak C—H...N hydrogen bonding is present in the crystal structure.

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The asymmetric unit of the title compound, C40H60O5S, comprises two diastereomers related, except for the chiral camphor groups, by a pseudo-inversion centre. In both diasteromers, the camphor sulfate moiety maintained the absolute configuartion (R,S) of the precursor. However, the absolute configurations at the methine C atoms are of opposite chirality. Both mol­ecules reveal intra­molecular O—H...O hydrogen bonds, whereas van der Waals inter­actions define the crystal packing.
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