Complex sentence: A United States patent application was submitted on 30 June 1989, for Avelox (moxifloxacin hydrochloride) but it was not until 1999 (ten years later) that Avelox was approved by the U.S. Food and Drug Administration (FDA) for use in the United States.
Split into simpler sentences: A United States patent application was submitted on 30 June 1989, for Avelox (moxifloxacin hydrochloride). In 1999 Avelox was approved by the U.S. Food and Drug Administration (FDA) for use in the United States.