@article{varala_enugala_adapa_2007,  title={p-nitrobenzoic acid promoted synthesis of 1,5-benzodiazepine derivatives},  volume={18},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532007000200008},  DOI={10.1590/S0103-50532007000200008},  number={2},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Varala, Ravi and Enugala, Ramu and Adapa, Srinivas R.},  year={2007},  month={Mar},  pages={291–296} }