Experimental Crystal data

R factor = 0.069; wR factor = 0.212; data-to-parameter ratio = 9.6. The title compound, C16H13NO3, exists in the keto form and the isoquinoline system is essentially planar (mean deviation = 0.0424 Å). The dihedral angle between the aromatic rings is 4.2 (2). In the crystal, molecules are linked via weak C— H O hydrogen bonds and C—H interactions, forming a three-dimensional structure. Related literature For the biological properties of the title compound, see