Xiao Shi, Xiu, Dian He, Shao Bai Li, Xin Lei, and Huan Yang. 2013. “An Efficient Synthesis of Dichotomine A via Cyclization of L-Tryptophan Derivative”. Asian Journal of Chemistry 25 (11):6387-90. https://doi.org/10.14233/ajchem.2013.14662.