The side chain of meropenem is a pharmaceutical intermediate, which is mainly used in the production of antibiotic drug meropenem. For the treatment of patients with severe infection or multi-drug resistant bacteria infection, whether it is G+ bacteria or G- bacteria, it has a good effect, but it is not suitable for fighting methicillin-resistant Staphylococcus aureus. It is also not suitable for infections with other carbapenem-resistant bacteria, such as some Acinetobacter species. If it is used against Pseudomonas aeruginosa, aminoglycosides (such as amikacin) should be used in combination.