Patent ID: 8722863

Claim:
A crystalline form of Fidaxomycin, wherein the crystalline form is crystalline form of Fidaxomycin, designated as Form Z1, characterized by data selected from one or more of the following: a powder X-ray diffraction pattern having peaks at: 4.3, 8.2 and 11.2 degrees two theta±0.2 degrees two theta; a powder X-ray diffraction pattern substantially as depicted in FIG. 4 ; and by combinations of these data; crystalline Form Z of Fidaxomycin characterized by data selected from one or more of the following: a powder X-ray diffraction pattern having peaks at: 4.1, 9.7, 10.2, 11.2 and 15.6 degrees two theta±0.2 degrees two theta; a powder X-ray diffraction pattern substantially as depicted in FIG. 8 ; and by combinations of these data; or crystalline form of Fidaxomycin, designated as Form C, characterized by data selected from one or more of the following: a powder X-ray diffraction pattern having peaks at: 6.8, 7.9, 10.0, 10.2, 12.2, 13.4, 14.6, 15.4, 16.4, 17.5, 18.4 and 23.1 degrees two theta±0.1 degrees two theta; a powder X-ray diffraction pattern substantially as depicted in FIG. 7 ; and by combinations of these data.