novobiocin: an antibiotic obtained from an actinomycete and used to treat infections by Gram-positive bacteria
antibiotic: a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections
carbon tetrachloride: a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined