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In the title compound, C14H16N2O3, an analog of the chromophore in green fluorescent protein, the meth­oxy­phenyl substituent and the imidazole N adopt a Z conformation with respect to the C=C bond. Aside from the hy­droxy­ethyl group, the mol­ecule is approximately planar, with the five- and six-membered ring planes forming a dihedral angle of 9.3 (1)°. An intra­molecular C—H...N contact occurs. In the crystal, O—H...N hydrogen bonds link the mol­ecules, forming chains along the b-axis direction. C—H...O hydrogen bonds are also observed.

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In the title compound, C19H18ClNO3, the non-aromatic part of the fused ring system adopts an envelope conformation with the central methyl­ene C atom as the flap. The dihedral angle between the pyridine and benzene rings is 56.98 (3)°. In the crystal, mol­ecules are linked into double layers parallel to (100) by a network of weak C—H...O inter­actions.
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