Three New Cycloartane Triterpenoids from Astragalus bicuspis - Jan, Saleem; Abbaskhan, Ahmed; Musharraf, Syed Ghulam; Sattar, Samina A.; Samreen; Resayes, Saud I.; Al-Othman, Zeid A.; Al-Majid, Abdullah M.; Atta-ur-Rahman; Choudhary, M. Iqbal (Planta Medica, 2011)