napthoquinone antibiotics atovaquone antibiotic_resistance ARO:3009155 CAS:95233-18-4 Atovaquone is an antimicrobial medication for the prevention and treatment of Pneumocystis jirovecii pneumonia (PCP). It is a naphthoquinone compound having a 4-(4-chlorophenyl)cyclohexyl group at the 2-position and a hydroxy substituent at the 3-position. ChEMBL:CHEMBL1450 ChEBI:575568 PubChem:74989