@article{gao_shen_huang_yang_shu_hu_li_2013,  title={2"-Ethyl-furanoflavone derivatives from the stems of Cassia fistula and their cytotoxicity},  volume={24},  ISSN={0103-5053},  url={https://doi.org/10.5935/0103-5053.20130091},  DOI={10.5935/0103-5053.20130091},  number={4},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Gao, Xue-Mei and Shen, Yan-Qiong and Huang, Xiang-Zhong and Yang, Li-Ying and Shu, Li-Dan and Hu, Qiu-Fen and Li, Gan-Peng},  year={2013},  month={Apr},  pages={685–689} }