19494-89-4 5-HP 5-Hydroxy-2-formylpyridine thiosemicarbazone 5-Hydroxypicolinaldehyde thiosemicarbazone 5-Hydroxypyridine-2-carboxaldehyde thiosemicarbazone Hydrazinecarbothioamide, 2-[(5-hydroxy-2-pyridinyl)methylene]- NSC 107392 NSC-107 392 NSC107392 Picolinaldehyde, 5-hydroxy-, thiosemicarbazone