ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, cilt.62, 2006 (SCI-Expanded)
In the title compound, C14H9NO4S, the benzopyran and thiazolidine ring systems are each planar. The thiazolidine ring makes a dihedral angle of 3.84 (4)degrees with the benzopyran ring system. The molecular structure is stabilized by intramolecular C-H center dot center dot center dot O interactions.