A phytochemical examination of various accessions of Phalaris coerules
cens for the presence of toxic phenylethylamines, indoloamines and tet
rahydro-beta-carbolines revealed the presence of oxindoles previously
not reported to occur in Phalaris species. One of the oxindoles, the s
tructure of which was elucidated by spectroscopic methods, has not hit
herto been reported to occur naturally and has been given the;trivial
name coerulescine. (C) 1998 Published by Elsevier Science Ltd. All rig
hts reserved.