Are there alternatives to 1H-Indole-3-carboxylic acid, octahydro-3-oxo-2,6-methano-2H-quinolizin-8-yl ester (CAS: 115956-12-2) in synthesis?

In the synthesis of 1H-Indole-3-carboxylic acid, octahydro-3-oxo-2,6-methano-2H-quinolizin-8-yl ester (CAS: 115956-12-2), there are several alternatives that can be considered. Common analogs and isomers, such as 1H-indole-3-carboxylic acid derivatives, can serve as effective substitutes. Additionally, using alternative reagents like substituted anilines or other carboxylic acid derivatives can provide similar functionalities in the synthesis process.