title: Formation of diketopiperazines by Penicillium italicum isolated from oranges.
abstract: Prolyl-2-(1',1'-dimethylallyl)tryptophyldiketopiperazine and 12,13-dehydroprolyl-2-(1',1'-dimethylallyl)tryptophyldiketopiperazine, known metabolites of Aspergillus ustus, were produced in low yield by Penicillium italicum in liquid culture and on unsterilized orange peel.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002855:Chromatography, Thin Layer; D002957:Citrus; D006569:Hesperidin / Q000096:biosynthesis; D013058:Mass Spectrometry; D010407:Penicillium / Q000302:isolation & purification / Q000378:metabolism*; D010879:Piperazines / Q000096:biosynthesis*; D010935:Plant Diseases; D010944:Plants / Q000382:microbiology; D013045:Species Specificity; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D010879:Piperazines; D006569:Hesperidin