Compounds of the formula ##STR1## wherein R may be hydrogen or a straight or branched chain alkyl radical of from 1 to 10 carbon atoms, aryl of from 6 to 10 carbon atoms, or aralkyl of from 7 to 10 carbon atoms; Y may be hydrogen, alkyl of from 1 to 4 carbons, CF.sub.3, F, Cl, or Br; and Z may be hydrogen or as defined hereinafter. These compounds are useful as central nervous system stimulants or more specifically in enhancing performance or as mood elevators.