R is phenyl, W substituted phenyl, naphthyl, W substituted naphthyl, benzodioxolyl, heteroaryl, W substituted heteroaryl, benzofused heteroaryl and W substituted benzofused heteroaryl, wherein heteroaryl is selected from {HEAD ~ the group} consisting of pyrrolyl, pyridinyl, pyrimidinyl, pyrazinyl, triazinyl, imidazolyl, thiazolyl, pyrazolyl, thienyl, oxazolyl and furanyl, and for {TAIL ~ nitrogen} containing heteroaryls, the N oxides thereof 
R is phenyl , W substituted phenyl , naphthyl , W substituted naphthyl , benzodioxolyl , heteroaryl , W substituted heteroaryl , benzofused heteroaryl and W substituted benzofused heteroaryl , wherein heteroaryl is selected from { HEAD ~ the group } consisting of pyrrolyl , pyridinyl , pyrimidinyl , pyrazinyl , triazinyl , imidazolyl , thiazolyl , pyrazolyl , thienyl , oxazolyl and furanyl , and for { TAIL ~ nitrogen } containing heteroaryls , the N oxides thereof
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