4-(6-Oxo-1,6-dihydro-pyrimidin-4-yl)-piperazine-1-carboxylic acid tert-butyl ester

1,1-Dioxo-3-propyl-1lambda6-thietane-3-carbaldehyde

2-[(2-Methylcyclopropyl)methyl]oxane-2-carbaldehyde

3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-{[(3-methyl-1H-pyrazol-4-yl)methyl]carbamoyl}propanoic acid

3-{2-[1-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclohexyl]acetamido}propanoic acid

3-[3-cyclopropyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanamido]-2-methoxypropanoic acid

3-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-fluorophenyl]-N-methylformamido}-2-methylpropanoic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methyl-2-(1-methyl-1H-pyrazol-4-yl)acetamido]-2-methylpropanoic acid

3-{1-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylphenyl]-N-methylformamido}-2-methylpropanoic acid

3-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-N-methyl-2-phenylacetamido]-2-methylpropanoic acid

3-{1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2,5-oxadiazole-3-carbonyl]pyrrolidin-3-yl}propanoic acid