inhibitors of MsrA efflux pump adjuvants which alter physiology inhibitors of tetK efflux pump baicalin ARO:3007329 CAS:21967-41-9 antibiotic_resistance baicalein ChEBI:2981 ChEMBL:CHEMBL485818 PubChem:5281605 Baicalin is a flavonoid compound that is able to inhibit the activity of tetK and MsrA antibiotic efflux pumps. It is also able to inhibit the formation of bacterial biofilms and disrupt quorum sensing.