@article{somasekhar_2014,  title={Optimization and validation of an RP-HPLC method for the estimation of 6-mercaptopurine in bulk and pharmaceutical formulations},  volume={50},  ISSN={1984-8250},  url={https://doi.org/10.1590/S1984-82502014000400015},  DOI={10.1590/S1984-82502014000400015},  number={4},  journal={Brazilian Journal of Pharmaceutical Sciences},  publisher={Universidade de São Paulo, Faculdade de Ciências Farmacêuticas},  author={Somasekhar, Vanita},  year={2014},  month={Oct},  pages={793–797} }