In {HEAD ~ preferred compounds} of {TAIL ~ Formula I}, Y is an dialkoxyphosphonate, or α hydroxyamide group and Z is an acyl or α ketocarbamate functionality 
of
In { HEAD ~ preferred compounds } of { TAIL ~ Formula I } , Y is an dialkoxyphosphonate , or α hydroxyamide group and Z is an acyl or α ketocarbamate functionality
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL 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