Abstract: Disclosed are novel compounds of the formula: ##STR1## wherein: X=--NR.sub.5 R.sub.6, or --OR.sub.7 ;R.sub.1 and R.sub.2 are independently hydrogen, substituted or unsubstituted alkyl, haloalkyl, hydroxyalkyl alkoxyalkyl, alkylaminoalkyl or arylalkyl having up to 18 carbons, cycloalkyl; phenyl or naphthyl; alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituents;R.sub.3 is hydrogen, benzyl, alkoxybenzyl, halobenzyl or alkylbenzyl, provided that if neither R.sub.1 nor R.sub.2 is hydrogen, then R.sub.3 is hydrogen;R.sub.4 is a divalent aromatic group which is substituted or unsubstituted;R.sub.5, R.sub.6 and R.sub.7 are independently hydrogen, alkyl, hydroxyalkyl, haloalkyl, alkoxyalkyl, alkylaminoalkyl, acylaminoalkyl, aminoalkyl or phenylalkyl having up to 12 carbons; a cycloalkyl substitutent; phenyl or naphthyl; an alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituent;Furthermore, either R.sub.1 and R.sub.3 or R.sub.1 and R.sub.

Abstract: Disclosed are novel compounds of the formula: ##STR1## wherein: X=--NR.sub.5 R.sub.6, or --OR.sub.7 ;R.sub.1 and R.sub.2 are independently hydrogen, substituted or unsubstituted alkyl, haloalkyl, hydroxyalkyl alkoxyalkyl, alkylaminoalkyl or arylalkyl having up to 18 carbons; cycloalkyl; phenyl or naphthyl; alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituents.R.sub.3 is hydrogen, benzyl, alkoxybenzyl, halobenzyl or alkylbenzyl, provided that if neither R.sub.1 nor R.sub.2 is hydrogen, then R.sub.3 is hydrogen.R.sub.4 is a divalent aromatic group which is substituted or unsubstituted.R.sub.5, R.sub.6, and R.sub.7 are independently hydrogen, alkyl, hydroxyalkyl, haloalkyl, alkoxyalkyl, alkylaminoalkyl, acylaminoalkyl, aminoalkyl or phenylalkyl having up to 12 carbons; a cycloalkyl substituent; phenyl or naphthyl; an alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituent.Furthermore, either R.sub.1 and R.sub.3 or R.sub.1 and R.sub.