. . "haloacetamido, amidino, guanidino, alkoxy, hydroxy, amino, alkoxyamino, alkylamino, alkylthio, amidosulfonyl, alkyl, halo, haloalkyl, haloalkoxy, hydroxyalkyl, hydroxyhaloalkyl, carboalkoxy, carboxy, carboxamido,cyano, and Q.sup.b ; A is a bond or (CH(R.sup.15)).sub.pa --(W.sup.7).sub.rr wherein rr is 0 or 1, pa is an integer selected from 0 through 3, and W.sup.7 is (R.sup.7)NC(O) or N(R.sup.7);" . .