t one aromatic nucleus; Q can be a divalent alkylene radical, a divalent arylene radical, a divalent aralkylene radical, a divalent arylenealkylene radical, wherein R is an alkylene radical, or R can be taken together with Q to form a R, R and R can be lower alkyl or aryl groups, or R and R and the nitrogen atom to which they are attached can together with Q represent the atoms and bonds necessary