Abstract
In the crystal structure of the title compound, C11H15NO4S, two independent molecules are present per asymmetric unit; they are dimerized through O-H center dot center dot center dot O hydrogen bonds between their carboxy groups to generate R-2(2)(8) loops. An intramolecular N-H center dot center dot center dot O link in one of the molecules closes an S(5) ring. The dimers are linked by N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds to form a three-dimensional network. The C atoms of the isopropyl group of one of the molecules are disordered over two orientations in a 3:1 ratio.