Fraxidin is a class of coumarin. It is isolated from the roots of Jatropha podagrica. It also shows antibacterial activity against Bacillus subtilis with an inhibition zone of 12 mm at a concentration of 20 µg disk.
Polymyxin B1, a potent antimicrobial lipopeptide derived from Bacillus polymyxa, has potential for treating multidrug-resistant Gram-negative bacterial infections.
Tyrothricin, a polypeptide antibiotic mixture isolated from Bacillus brevis, consists of tyrocidines and gramicidins, and displays activity against bacteria, fungi, and some viruses.