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[1]JournalofChemicalResearch,Miniprint,1980,#6,p.2845-2866
[1]JournalofHeterocyclicChemistry,1991,vol.28,p.749-752
[1]JournalofChemicalResearch,Miniprint,1980,p.2845-2866
[1]JournalofOrganicChemistry,2007,vol.72,p.3122-3124
[2]Tetrahedron,2010,vol.66,p.2474-2485
[3]Patent:US6355796,2002,B1
[4]Patent:US6140270,2000,A
[5]Patent:US5484763,1996,A
[6]Patent:EP908457,1999,A1
[7]Patent:US6191275,2001,B1
[8]Patent:EP1150962,2004,B1.Locationinpatent:Page22
[9]Patent:US2002/28748,2002,A1
[1]JournalofHeterocyclicChemistry,1991,vol.28,p.749-752