IUPAC definition : Compounds having the structure R sub 2 /sub C NNHC( O)NH sub 2 /sub , formally derived
by condensation of aldehydes or ketones with semicarbazide [NH sub 2 /sub NHC( O)NH
sub 2 /sub ].;
Compounds having the structure R sub 2 /sub C NNHC( O)NH sub 2 /sub , formally derived
by condensation of aldehydes or ketones with semicarbazide [NH sub 2 /sub NHC( O)NH
sub 2 /sub ].