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