@article{gu_li_2011,  title={Microwave-assisted synthesis of indole-2-carboxylic acid esters in ionic liquid},  volume={22},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532011001100003},  DOI={10.1590/S0103-50532011001100003},  number={11},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Gu, Lijun and Li, Xiangguang},  year={2011},  month={Nov},  pages={2036–2039} }