1-Cyclopropyl-8-ethoxy-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid

This compound, CAS 143158-55-8, is a synthetic organic molecule featuring a 1,4-dihydroquinoline core. Key structural elements include a cyclopropyl group at N1, an ethoxy group at C8, and two fluorine atoms at C6 and C7, along with a carboxylic acid at C3 and a ketone at C4. Its identification as an impurity of Moxifloxacin highlights its utility in pharmaceutical research, particularly for analytical method development, impurity profiling, and as a reference standard in the synthesis and quality assurance of fluoroquinolone antibiotics. Classified as 'druglike_bioactive_like', it may also serve as a building block for novel chemical entities in medicinal chemistry studies.

• Handle in a well-ventilated area or fume hood. Avoid inhalation, ingestion, and skin/eye contact. Wear appropriate PPE (gloves, safety glasses, lab coat). Refer to the Safety Data Sheet (SDS) for comprehensive hazard information and safe handling protocols. Store securely in a cool, dry environment.