(under subclass 570) Subject matter in which the added material comprises a compound containing a heterocyclic ring of five or more members including at least one nitrogen atom, said heterocyclic ring being joined through an unsaturated acyclic carbon chain to an aryl nucleus wherein one of the ring carbons of that nucleus is bonded to a nitrogen atom so that the nitrogen bonded to the aryl nucleus and the nitrogen of the heterocyclic group are linked to each other through a conjugated chain of carbon atoms, e.g., [figure]
