Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A structure of 2-phenyl-1 -imidazo[1,2-a]pyridinium-3-olate has been assigned to the product of the title reaction instead of the previously reported one. In solution, undergoes photo-oxidation related to that occurring in luciferine. ... Both products melt with decomposition above ...