Polyhydroxyanthraquinones as quorum sensing inhibitors from the guttates of Penicillium restrictum and their analysis by desorption electrospray ionization mass spectrometry - Figueroa, M; Jarmusch, A K; Raja, H A; El-Elimat, T; Kavanaugh, J S; Horswill, A R; Cooks, R G; Cech, N B; Oberlies, N H (J Nat Prod, 2014)