@article{shi_dong_huo_su_li_yamada_kiyota_2007,  title={7,8beta-dihydroponasterone A, a new phytoecdysteroid from the needles of the Japanese Yew, Taxus cuspidata},  volume={18},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532007000500032},  DOI={10.1590/S0103-50532007000500032},  number={5},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Shi, Qing-Wen and Dong, Mei and Huo, Chang-Hong and Su, Xiao-Hui and Li, Xing and Yamada, Teiko and Kiyota, Hiromasa},  year={2007},  pages={1081–1084} }