A five-membered heterocyclic ring containing four nitrogen atoms.
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1-Azabicyclo[2.2.1]heptane-3-carboxylic acid, exo-(±)-
N-HEXADECYLMETHACRYLAMIDE
4-fluorophenylhydrazono-1H-tetrazol-5-yl-acetonitrile
5-chloro-1-phenyltetrazole-3-oxide
2,5-anhydro-6-O-benzoyl-4-O-benzyl-3-O-methanesulfonyl-D-glucose ethylene acetal