The process 11 wherein at least one group R3 is {HEAD ~ a group} of {TAIL ~ the formula} ##STR16## 
of
The process 11 wherein at least one group R3 is { HEAD ~ a group } of { TAIL ~ the formula } # # STR16 # #
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH