Moxifloxacin-d4 is intended for use as an internal standard for the quantification of moxifloxacin (Cay-14830) by GC- or LC-MS. Moxifloxacin is a fluoroquinolone antibiotic that is active through multiple routes of administration. Formulations containing moxifloxacin have been used to treat bacterial infections...

3-Methylquinoxaline-2-carboxylic acid (MQCA) is a major metabolite of olaquindox, an antibiotic and swine growth regulator. It induces cell cycle arrest at the S phase and is toxic to Chang liver cells in a concentration- and time-dependent manner. MQCA has been used as a marker of olaquindox use in livestock...