Boc-Gly-Daa-Gly-OH

4-(2-(5-(aminomethyl)-2,4-dimethylthiophen-3-yl)-3,3,4,4,5,5-hexafluorocyclopent-1-en-1-yl)-3,5-dimethylthiophene-2-carboxylic acid

4-(3,3,4,4,5,5-hexafluoro-2-(2-methylthiophen-3-yl)cyclopent-1-en-1-yl)-5-methylthiophene-2-carbaldehyde

4-(3,3,4,4,5,5-hexafluoro-2-(2-methyl-5-phenylthiophen-3-yl)-cyclopent-1-enyl)-5-methyl-thiophene-2-carbaldehyde