Commercial dutasteride crystallizes in the orthorhombic space group P212121 (#19), with a = 7.587 44(3), b = 9.960 80(5), c = 33.500 42(12) Å, V = 2531.862(17) Å3, and Z = 4. The structure was solved and refined using synchrotron powder diffraction data, Rietveld, and density functional techniques. The most prominent feature of the structure is a zigzag chain of strong N–H···O = C hydrogen bonds along the a-axis. The powder pattern has been submitted to ICDD for inclusion in future releases of the Powder Diffraction File™.
