Acta Crystallographica Section E: Structure Reports Online, vol.68, no.5, 2012 (SCI-Expanded)
In the title compound, C18H21NO4S, the aromatic rings are almost normal to each other, with a dihedral angle of 89.27 (18)°. The molecular conformation is stabilized by an intramolecular C-HO interaction, which generates an S(6) motif. In the crystal, N-HO and C-HO hydrogen bonds lead to the formation of chains propagating along [010]. Neighbouring chains are linked via a C-H interaction. The -CH2CH2CH3 atoms of the butyl group are disordered over two sets of sites, with a refined site-occupancy ratio of 0.536 (16):0.464 (16).