1 3HU (S)-1-(2'-amino-2'-carboxyethyl)-3-[(2-carboxythien-3-yl)methyl]thieno[3,4-D]pyrimidin-2,4-dione 1.000 2 UBA (S)-1-(2-amino-2-carboxyethyl)-3(2-carboxythiophene-3-yl-methyl)-5-methylpyrimidine-2,4-dione 0.852 3 UBF 3-({3-[(2s)-2-amino-2-carboxyethyl]-5-bromo-2,6-dioxo-3,6-dihydropyrimidin-1(2h)-yl}methyl)thiophene-2-carboxylic acid 0.852 4 UB1 3-({3-[(2s)-2-amino-2-carboxyethyl]-5-methyl-2,6-dioxo-3,6-dihydropyrimidin-1(2h)-yl}methyl)-4,5-dibromothiophene-2-carboxylic acid 0.793 5 UBC (S)-1-(2-amino-2-carboxyethyl)-3-(2-carboxybenzyl)pyrimidine-2,4-dione 0.786