Synonyms: | 1-(3-Hydroxy-1-oxoinden-2-yl)pyridiniumhydroxide, inner salt (6CI); Pyridinium, 1,3-dihydro-1,3-dioxo-2H-inden-2-ylide(9CI); Pyridinium, 1,3-dioxo-2-indanylide (8CI); 1,3-Indandione 1,3-pyridiniumbetaine; 2-(N-Pyridinium)-1,3-indandione betaine; 2-Pyridinio-1,3-indandioneylide |