where A is --H, --CH3, or a halogen and Z is COOX' where X' is an alkyl group containing from about 2 to about 8 carbon atoms or a hydroxyalkyl group containing from about 1 to 8 carbon atoms; or Z is --C6 H4 Y' wherein Y' is H or an alkyl group having from about 1 to about 4 carbon atoms, --CN, Br, or Cl, ##STR3## wherein Z' is an alkyl group having from about 1 to about 8 carbon atoms and --CH??