Are there alternatives to 1-(5-Bromo-7-nitro-2,3-dihydro-1H-indol-1-yl)ethanone (CAS: 62368-07-4) in synthesis?

In the synthesis of biologically active compounds, 1-(5-Bromo-7-nitro-2,3-dihydro-1H-indol-1-yl)ethanone (CAS: 62368-07-4) may have specific functional groups that are not easily replaced. However, there are alternatives such as brominated and nitro-substituted indoles, which can be used as precursors or alternatives in synthetic routes. Isomers and analogs can also serve as viable substitutes based on the desired chemical properties and reactivity.