Provided herein are antibacterial compounds, wherein the compounds in some embodiments have broad spectrum bioactivity. In various embodiments, the compounds act by inhibition of bacterial type 1 signal peptidase (SpsB), an essential protein in bacteria. Pharmaceutical compositions and methods for treatment using the compounds described herein are also provided.本文提供抗細菌化合物,其中該等化合物在一些實施例中具有廣效生物活性。在各種實施例中,該等化合物藉由抑制細菌中一種必不可少之蛋白質細菌1型信號肽酶(SpsB)來起作用。還提供使用本文所述之化合物的醫藥組合物及治療方法。