| prov:value
| - The free valences may be satisfied with radicals such as hydrogen, alkyl, alkeny-l, alkynyrl, hydroxyalky-l, aralkyl, cyoloalky-l, amino, dialky-lamino, guanyl, aminoalkyl, poly(aminoalkylene)aminoa-lkyl, pyridyl, pyrimidinyl, tri'azyl; alternatively, the free valences may be joined with a divalent group which with the nitrogen forms a heterocyo'lic ring such as ethyleneimine, trimethyleneimine, p
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