Shrestha, R. L., and R. N. Jha. “An Isoquinoline Alkaloid, Protopine from Corydalis Govaniana Growing in Himalayan Region of Nepal”. Journal of Nepal Chemical Society 28 (May 24, 2013): 106–109. Accessed February 21, 2026. https://www.nepjol.info/index.php/JNCS/article/view/8116.