Patent ID: 8334303

Claim:
A crystalline form of mutilin 14-(exo-8-methyl-8-azabicyclo[3.2.1]oct-3-ylsulfanyl)-acetate characterized by at least one of: i) an x-ray powder diffraction (XRPD) pattern comprising peaks, expressed in degrees 2θ, at 7.9, 8.8, 10.8, 11.0, 11.6, 12.2, 13.2, 13.9, 15.7, 17.6, 18.0 and 18.8+/−0.1, ii) an infra-red spectrum measured by attenuated total reflectance (ATR) comprising peaks at 3191, 2934, 1720, 1450, 1387, 1376, 1337, 1307, 1277, 1223, 1119, 1035, 982, 957, 943, 911, 867, 845, 786 and 762 cm −1 +/−0.2 cm −1 , and iii) a differential scanning calorimetry (DSC) thermogram with an onset temperature of from about 142 to about 145° C.