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Flumequine (R-802) is a broad-spectrum antibiotic effective against both Gram-positive and Gram-negative bacteria. It operates by inhibiting DNA gyrase (a type II topoisomerase) and topoisomerase IV, enzymes crucial for separating bacterial DNA, thereby preventing cell division.

Flumequine-13C3 is intended for use as an internal standard for the quantification of flumequine by GC- or LC-MS. Flumequine (T1060) is a fluoroquinolone antibiotic.1It is active againstS. aureus, S. pyogenes, B. subtilis, E. coli, P. aeruginosa, S. faecalis, andK. pneumoniae (MICs = 1-100 μg/ml). Flumequine (T1060) is also active against field isolates of B. hyodysenteriae (MICs = 6.25-200 μg/ml).2It inhibits DNA gyrase, disrupting supercoiling of bacterial DNA to block transcription and replication.3