Eleven new cytochalasins have been isolated from an unidentified Daldi
nia sp. of fungus. These were identified as 10 10-phenyl-(11)-cytochal
asans and one 10-phenyl-22-oxa-(12)-cytochalasan. The latter metabolit
e is the first report of a 22-oxa-(12)-cytochalasan. Their structures
were established by spectroscopic methods, in particular by high-field
NMR spectroscopy.