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