financially supported by the National Natural Science Foundation of China(Nos.22077041 and 31770380).
Four unprecedented sulfur-containing cytochalasans,thiocytochalasins A−D(1−4),were isolated from an endophytic fungus Phoma multirostrata XJ-2-1.Thiocytochalasins A(1)and B(2)feature a novel 5/6/14/5 tetracyclic scaff...