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