Ryan, D. E. published the artcileLigand structure and fluorescence of metal chelates. N-Heterocyclic hydrazones with zinc, Quality Control of 2215-33-0, the publication is Analytica Chimica Acta (1972), 58(1), 101-6, database is CAplus.
-Benzimidazolecarboxaldehyde 2-quinolylhydrazone (I) is the most sensitive reagent of 15 N-containing heterocyclic hydrazones for the fluorimetric determination of Zn; <1 ppb Zn can be determined with excitation and emission wavelengths of 470 and 520
Analytica Chimica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Quality Control of 2215-33-0.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem