As a third-generation fluoroquinolone broad-spectrum antibacterial API, it is the levorotatory isomer of ofloxacin, with stronger antibacterial activity and lower toxicity than ofloxacin[superscript:2][superscript:3]. It is mainly used in the production of oral and injectable pharmaceutical preparations such as tablets, capsules, and injections, for the treatment of various infections caused by sensitive bacteria, including community-acquired and hospital-acquired pneumonia, chronic bronchitis acute bacterial infection exacerbation, acute sinusitis, skin and soft tissue infections, chronic bacterial prostatitis, acute pyelonephritis, complicated urinary tract infections, typhoid fever, infectious diarrhea, and other diseases[superscript:2]. It can also be used in combination with appropriate antibacterial therapy to eradicate Helicobacter pylori, and is applicable to non-gonococcal urethritis and cervicitis caused by Chlamydia trachomatis[superscript:2]. In addition, it is used in pharmaceutical research and development, preclinical antibacterial activity testing, and related medical research fields[superscript:3].