@article{rodríguez_villalobos_becerra_manchado_herrera_zullo_2003,  title={Synthesis and biological activity of three new 5a-hydroxy spirostanic brassinosteroid analogues},  volume={14},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532003000300022},  DOI={10.1590/S0103-50532003000300022},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Rodríguez, Caridad R. and Villalobos, Yohan I. and Becerra, Esther A. and Manchado, Francisco C. and Herrera, Deysma C. and Zullo, Marco A. T.},  year={2003},  month={May},  pages={466–469} }