Patent ID: 8207191

Claim:
A method of treating a microbial infection in a mammal, comprising administering topically to said mammal, in need thereof an effective amount of a crystalline mutilin 14-(exo-8-methyl-8-azabicyclo[3.2.1]oct-3-ylsulfanyl)-acetate characterized by at least one of: (i) an infra-red spectrum measured by attenuated total reflectance having peaks at 3234, 1735 and 1725 cm −1 , (ii) a differential scanning calorimetry profile having an endotherm with an onset temperature of 125-127° C., and (iii) an X-ray powder diffraction pattern having peaks at about 9.6, about 12.8, about 13.9 and about 19.6.