The infrared and mass spectra of N-2-(3'-phthalide-yl)phthalazin-1-one were
studied. The loss of one or two natural CO residues was observed from the
title compound and its partial fragment ions. Using the MIKE spectrum of io
n mit 250, its most possible structure was confirmed. Two possible paths of
the formation of the title compound were also proposed. (C) 2000 Elsevier
Science B.V. All rights reserved.