Abstract
The seven-membered ring of the title compound, C12H12N2O3, which is fused with the phenylene ring, adopts a boat-shaped conformation (with the methine C atom as the prow and the phenylene C atoms as the stern); the H atom on the methine linkage exists in an axial position. The five-membered ring that is fused with the seven-membered ring adopts an envelope conformation (with the C atom bearing the hydroxy substituent representing the flap) [the deviation from the plane defined by the other four atoms is 0.200 (7) Å in one molecule and 0.627 (5) Å in the other]. The two independent molecules are disposed about a pseudo center of inversion and are connected by a pair of N—H⋯O hydrogen bonds. Adjacent dimers are linked by a pair of O—H⋯O hydrogen bonds, generating a chain running along the b axis.
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