5-(2,5-Dimethyl­phenoxy)-2,2-dimethyl­pentanoic acid (gemfibrozil)

The structure of gemfibrozil, C₁₅H₂₂O₃, a hypolipidemic agent, is reported in the context of studies on polymorphism, which is considered to affect the stability and bioavailability of the drug. The structure contains two mol­ecules in the asymmetric unit, which are linked via two O—H...O hydrogen bonds [O...O = 2.631 (2) and 2.652 (2) Å].