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The molecular structure of itraconazole, C35H38Cl2N8O4, has been determined from single-crystal X-ray diffraction data. The two molecules in the asymmetric unit mainly differ in the conformation of the methoxyphenylpiperazine moiety. Apart from a 180° rotation of the triazole ring, the geometry of the dichlorophenylethyloxytriazole moiety is almost the same as the dichlorophenylethyloxyimidazole geometry in miconazole, econazole and ketoconazole.