Hussien, Taha Abdelrahim, Naglaa Salah-Eldin Mohamed, Mahmoud F.M. Moustafa, and Magdi Abdelradi El-Sayed. 2010. “A New Natural Pyrrolone from the Egyptian Ageratum Species”. European Journal of Chemistry 1 (2):140-41. https://doi.org/10.5155/eurjchem.1.2.140-141.17.