Chloramphenicol is produced by the Streptomyces venezuelae, its chemical structure contains nitrophenyl, propylene glycol and dichloro-acetamide. The antimicrobial activity is mainly related with propylene glycol. 氯霉素(chloramphenicol)是由委内瑞拉链霉菌产生的抗生素,其化学结构含对硝基苯基、丙二醇和二氯乙酰胺三个部分,其抗菌活性主要与丙二醇有关。