1-(3-Hy­droxy­prop­yl)-3-phenyl­quinoxalin-2(1H)-one

In the title mol­ecule, C17H16N2O2, the quinoxaline portion is slightly folded about the N⋯N axis with an angle of 4.27 (4)°. In the crystal, O—H⋯O and weak C—H⋯O hydrogen bonds link mol­ecules along the b-axis direction. In addition, two sets of weak C—H⋯π(ring) inter­actions form a two-dimensional `step' motif parallel to the bc plane.