Royal Society of Chemistry, Dalton Transactions, 3(39), p. 704-706
DOI: 10.1039/b919119b
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Triapine (3-aminopyridine-2-carboxaldehyde thiosemicarbazone), which entered several phase I and II clinical trials as an antitumor chemotherapeutic agent, was found to possess intrinsic fluorescence properties (lambda(ex) = 360 nm), which enabled us to monitor the uptake and intracellular distribution in living human cancer cells by fluorescence microscopy.