Patent ID: 8247402

Claim:
A crystal of a monohydrate of (+)-(4R,5S,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-3[[(3S,5S)-5-(sulfamoylaminomethyl)pyrrolidin-3-yl]thio]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, said crystal having a powder X-ray diffraction pattern comprising peaks at diffraction angles (2θ) of about 13.04, 14.98, 15.88, 16.62, 20.62, 21.06, 22.18, 23.90, 26.08, 28.22 and 28.98 (degrees), wherein the powder X-ray diffraction pattern is obtainable using Cu Kα ray, 1.34 Angstroms (monochromator), tube voltage 40 kV, and tube current 40 mA.