G.  Pandey, Kumar, R., Banerjee, P., and Puranik, V. G., ?One-step stereospecific strategy for the construction of the core structure of the 5,11-methanomorphanthridine alkaloids in racemic as well as in optically pure form: synthesis of (+/-)-pancracine and (+/-)-brunsvigine?, European Journal of Organic Chemistry, no. 24, pp. 4571-4587, 2011.