Prulifloxacin Intermediate CAS Number: 154330-67-3 Chemical Name: 3-Quinolinecarboxylicacid, 2-( ethylthio) -6, 7-difluoro-4-hydroxy-, ethyl ester Synonyms: Ethyl4-hydroxy-6, 7-difluoro-2-( ethylthio) quinoline-3-carboxyl ate; Molecular Formula: C14H13F2NO3S Molecular Weight: 313.32 Appearance: pale yellow to white powder Density: 1.38 g/ cm3 Boiling Point: 402.7 ° C at 760 mmHg Flash Point: 197.4 ° C