Hase 2 studies. 3.4. Oxazolidinones utezolid (Formerly PNU-100480) (Pfizer) and AZD5847 (AstraZeneca). Sutezolid (formerly PNU100480, Pfizer) and AZD5847 (AstraZeneca) are new oxazolidinones in phase 2 development for TB [50]. Sutezolid is largely metabolized by flavin monooxygenases to sulfoxide and sulfone derivatives [51]. The sulfoxide metabolite is present in plasma at five to seven times the