PYRIDAZINE 289-80-5 InChI=1/C4H4N2/c1-2-4-6-5-3-1/h1-4 1,2-Diazabenzene 1,2-Diazine EINECS 206-025-5 NSC 90792 Orthodiazine o-Diazine CHEBI:30954 NSC90792 P57204_ALDRICH 82680_FLUKA ZINC01682358