In another embodiment of {TAIL ~ this invention} the compounds of formula are selected from the group consisting of the final compounds of Examples 2, 4, 5, 6, 8, 9, 10, 11, and 14, and {HEAD ~ the free base form} of the final compounds of Examples 15, 19, 20, 22, 25, and 26 
In another embodiment of { TAIL ~ this invention } the compounds of formula are selected from the group consisting of the final compounds of Examples 2 , 4 , 5 , 6 , 8 , 9 , 10 , 11 , and 14 , and { HEAD ~ the free base form } of the final compounds of Examples 15 , 19 , 20 , 22 , 25 , and 26
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH