Alkylhydrazine (example) 90px 1,1-Dimethylhydrazine Arylhydrazines (examples) 140px Phenylhydrazine 180px 2,4-Dinitrophenylhydrazine 180px 1,2-Diphenylhydrazine 120px Tetraphenylhydrazine<unk>  (R2N−NR2) are a class of chemical compounds with two nitrogen atoms linked via a covalent bond and which carry from one up to four alkyl or aryl substituents.<unk>  can be considered as derivatives of the inorganic<unk> (H2N−NH2), in which one or more hydrogen atoms have been replaced by hydrocarbon groups.
Hydrazines
Sulfonamide 
Thyroid blocker
Psychotropic alkylamines
Prostaglandin inhibitors
Steroid ester
Antimanic drugs
Anthopleurin