3-tert-butyl-1-methyl-1-(2-pyridin-4-ylpyrimidin-4-yl)urea

N-tert-butyl-9-oxo-2,4,6,8-tetraphenyl-3,7-diazabicyclo[3.3.1]nonane-3-carboxamide

N-tert-butyl-5-methyl-9-oxo-2,4,6,8-tetraphenyl-3,7-diazabicyclo[3.3.1]nonane-3-carboxamide

N-tert-butyl-5-(N-phenylanilino)penta-2,4-diynamide

1-(2-aminoethyl)-3-tert-butylurea