[1]Patent:US5447905,1995,A
[1]Tetrahedron,2013,vol.69,p.3907-3912
[2]Patent:US5447905,1995,A
[3]Patent:US5494887,1996,A
[4]Patent:US5571775,1996,A
[5]Patent:US5602075,1997,A
[1]Patent:US5534481,1996,A
[1]Tetrahedron,2013,vol.69,p.3907-3912
[1]Patent:WO2014/134566,2014,A2.Locationinpatent:Paragraph0693