Acta Cryst. (2013). E69, o1116-o1117 [ doi:10.1107/S1600536813016474 ]
Abstract: The title compound, C18H20N2O3S, exists as the phenol-imine form in the crystal and there are bifurcated intramolecular O-H(N/O) hydrogen bonds present. The conformation about the C=N bond is anti (1E); the C=N imine bond length is 1.287 (4) Å and the C=N-C angle is 122.5 (3)°. In the tetrahydrothienopyridine moiety, the six-membered ring has a flattened-boat conformation. In the crystal, molecules are stacked nearly parallel to (110) and a weak C-H interaction is observed. The carbonyl O atom is disordered over two positions and was refined with a fixed occupancy ratio of 0.7:0.3.
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