Bioxanthracenes and monomeric analogues from insect pathogenic fungus Conoideocrella luteorostrata Zimm. BCC 31648

Abstract Thirteen bioxanthracenes, including eight new 1 – 8 , together with twelve oxanthracenes and analogues, including nine new 9 – 17 , and two naturally occurring 18 and 19 , were isolated from insect pathogenic fungus, Conoideocrella luteorostrata Zimm. BCC 31648. Structures were determined by NMR spectroscopic and MS spectrometric analyses. Compounds 14 , 17 , and 18 displayed antimalarial and cytotoxic activities while compounds 2 , 9 , 11 , 12 , 15 and 19 exhibited only cytotoxic activity.