Abstract: There are disclosed compounds of the formula ##STR1## wherein R.sup.1 is pyridl, quinolinyl, pyrazinyl, pyridinyl, pyridazinyl, pyrimidinyl, quinoxalinyl, quinazolinyl or any of the foregoing substituted with halo, lower alkyl, lower alkyl carbonyl, benzoyl, carboxy, lower alkoxycarbonyl, OR.sup.2, N(R.sup.2).sub.2, CON(R.sup.2).sub.2, SO.sub.3 R.sup.2, SO.sub.2 N(R.sup.2).sub.2, phenylsulfonyl, lower alkylsulfonyl, cyano, nitro or trifluoromethyl;R.sup.2 is hydrogen, lower alkyl or phenyl;R.sup.3 is halo, morpholino, 4-methylpiperazino, R.sup.4 NNHR.sup.5, NR.sup.4 R.sup.5, OR.sup.5, SR.sup.5, R.sup.4 NCH.sub.2 CH.sub.2 OCH.sub.3, SCH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2, or ##STR2## R.sup.4 is hydrogen or lower alkyl; R.sup.5 is hydrogen, lower alkyl, lower alkanoyl, lower cycloalkylor phenyl; andR.sup.6 and R.sup.