Ullah Khan, Ihsan, Farman Ullah Khan, Javid Hussain, Syed Badshah, Nawshad Muhammad, Rahmat Ali Khan, Chong Fai Kait, et al. “Asperal: A New Clerodane Diterpene from Sonchus Asper”. Asian Journal of Chemistry 26, no. 9 (April 29, 2014): 2699–2701. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_10_44.