benzpyrazolyl dihydrobenzofuryl dihydrobenzothienyl dihydrobenzothiopyranyl dihydrobenzothiopyranyl sulfone dihydrobenzopyranyl indolinyl isochromanyl isoindolinyl naphthyridinyl phthalazinyl piperonyl purinyl pyridopyridyl quinazolinyl tetrahydroquinolinyl thienofuryl thienopyridyl thienothienyl and the like exemplary tricyclic heterocylclic groups include phenoxazinyl phenazinyl phenothiazinyl carbozolyl perminidinyl phenanthrolinyl carbolinyl naphthothienyl thianthrenyl and the like group include pyrazol 1 yl imidazol 1 yl pyrrol 1 yl 1 2 4 triazol 1 yl 1 2 4 triazol 4 yl 1 2 3 triazol 1 yl aziridin 1 yl pyrrolidin 1 yl piperidin 1yl piperazin 1 yl morpholin 1 yl 4 methyl diazepin 1 yl azepin 1 yl diazepin 1 yl 4 methyl piperazin 1yl and the like when a particular group is u201c substituted u201d e g cycloalkyl aryl heterocyclyl heteroaryl that group may have one or more substituents preferably from one to five substituents more preferably from one to three substituents most preferably from one to two substituents independently selected from the list of substituents with reference to substituents the term u201c independently u201d means that when more than one of such substituents is possible such substituents may be the same or different from each other under standard nomenclature used throughout this disclosure the terminal portion of the designated side chain is described first followed by the adjacent functionality toward the point of attachment thus for example a u201c phenylalkylaminocarbonylalkyl u201d substituent refers to a group of the formula the term u201c.