1 W70 2,6-dioxo-5-[2-(4-phenoxyphenyl)ethyl]-1,2,3,6- tetrahydropyrimidine-4-carboxylic acid 1.000 2 VRO 5-[2-(4-methoxyphenyl)ethyl]-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid 0.741 3 MRO 2,6-dioxo-5-(2-phenylethyl)-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid 0.731 4 3RO 5-[2-(3-chlorophenyl)ethyl]-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid 0.704 5 LRO 5-[2-(4-methylphenyl)ethyl]-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid 0.704