Stereoselective microbial reduction for the preparation of 1-(4-fluorophenyl)-3(R)-[3(S)-Hydroxy-3-(4-fluorophenyl)propyl)]-4(S)-(4 -hydroxyphenyl)-2-azetidinone

Granted: Oct 17, 2000 Filed: Feb 23, 1999

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.