karboksüülhapete derivaadid üldvalemiga RC(NHNH2)2=NNH2, kus R on süsivesinikradikaal
compounds, RC(NHNH2)2=NNH2, derived from carboxylic acids by replacing –OH by –NHNH2 (or N-substituted analogues) and =O by =NNH2 (or substituted analogues)
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