Crystal structure of 7-hydroxy-8-[(4-methylpiperazin-1-yl)methyl]-2 H -chromen-2-one

In the title compound, C 15 H 18 N 2 O 3 , the coumarin ring is essentially planar, with an r.m.s. deviation of 0.012 Å. An intramolecular O—H...N hydrogen bond forms an S (6) ring motif. The piperazine ring adopts a chair conformation. In the crystal, a C—H...O hydrogen bond generates a C (4) chain motif running along the c axis. The chain structure is stabilized by a C—H...π interaction. The chains are linked by π–π interactions [centroid–centroid distance of 3.5745 (11) Å], forming a sheet structure parallel to the bc plane.