The title compound, C 13 H 18 N 2 OS, crystallizes as NH tautomer. The C5-C8(O)-N system tends to be coplanar with the phenyl ring [C4-C5-C8-O = 8.7 (4)°] because of some π-conjugation along the O-C8-C(Ph) system [C5-C8 = 1.448 (4) Å] and the O···H4 = 2.49Å attractive interaction. The molecules in the crystal are held together by van der Waals forces and an intermolecular N-H···O hydrogen bond.
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