Williams, D.E.Bombuwala, K.Lobkovsky, E.De Silva, E.D.Karunaratne, V.Allen, T.M.Clardy, J.Andersen, R.J.2015-03-122015-03-121998Tetrahedron Letters, 39:p.9579-9582https://dl.nsf.gov.lk/handle/1/17937BiochemistryLichensCytotoxicityUsnea sp.Natural productsAmbewelamides A and B, antineoplastic epidithiapiperazinediones isolated from the lichen Usnea sp.ArticleRG/96/C/004FR 1262