{HEAD ~ Compound VI} is contacted with {TAIL ~ 2.4 difluorobenzylamine} under coupling conditions to form —N 3 methyl 6 5,7 dioxo 2,3,5,7,11,11a hexahydrooxazolopyridopyrazine 8 carboxamide  
is contacted with
{ HEAD ~ Compound VI } is contacted with { TAIL ~ 2.4 difluorobenzylamine } under coupling conditions to form — N 3 methyl 6 5,7 dioxo 2,3,5,7,11,11a hexahydrooxazolopyridopyrazine 8 carboxamide
HEAD 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