Y is CHCNR4 R5, wherein {HEAD ~ R4} is chosen from {TAIL ~ the group} consisting of H, alkyl, n cycloalkyl, n NHC alkyl, arylalkyl, CCH2 OR10, CC, alkyl NHSO2 R11, CC NHR10, and CCNHCCONHR10, wherein n=1 3, 
is chosen from
Y is CHCNR4 R5 , wherein { HEAD ~ R4 } is chosen from { TAIL ~ the group } consisting of H , alkyl , n cycloalkyl , n NHC alkyl , arylalkyl , CCH2 OR10 , CC , alkyl NHSO2 R11 , CC NHR10 , and CCNHCCONHR10 , wherein n=1 3 ,
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH