[1]Patent:US2012/165331,2012,A1.Locationinpatent:Page/Pagecolumn73-74
[2]Patent:WO2012/101487,2012,A1.Locationinpatent:Page/Pagecolumn127;128
[1]Patent:WO2016/161160,2016,A1.Locationinpatent:Paragraph0167
[1]Patent:WO2017/141036,2017,A1.Locationinpatent:Page/Pagecolumn78
[1]Patent:WO2017/149313,2017,A1.Locationinpatent:Page/Pagecolumn84;85
[1]Patent:WO2017/149313,2017,A1
Title: tert-Butyl 6-oxo-2,7-diaza-spiro[4.4]nonane-2-carboxyl-ate.
Journal: Acta crystallographica. Section E, Structure reports online 20111201