Crystalline antifungal polymorph

A crystalline polymorph Form I of the compound represented by the formula I

• and characterized by at least one of the following properties:
• a melting point range of about 164 to about 165° C. wherein the melting point range is determined using USP Class Ia procedure;
• a specific rotation equal to [a]25D=−29.4° wherein the specific rotation is determined using a concentration of 10 mg/ml in methanol;
• an X-ray powder diffraction pattern substantially similar to that presented in FIG. 1;
• a differential scanning calorimetry thermogram substantially similar to that presented in FIG. 7;
• or
• the proton NMR spectrum substantially similar to that presented in FIG. 10.