3-butyl-5-[3-[1-butyl-3-(carboxymethyl)hexahydro-2,4,6-trioxo-5-pyrimidinyl]-2-propenylidene]tetrah1(2H)-Pyrimidineacetic acid

3-butyl-5-[3-[1-butyl-3-(carboxymethyl)-1,2,3,4-tetrahydro-6-hydroxy-2,4-dioxopyrimidin-5-yl]allylidene]tetrahydro-2,4,6-trioxo-2H-pyrimidine-1-acetic acid

3-Butyl-5-[3-[[1-butyl-3-(carboxymethyl)-1,2,3,4-tetrahydro-6-hydroxy-2,4-dioxopyrimidin]-5-yl]-2-propenylidene]tetrahydro-2,4,6-trioxo-1(2H)-pyrimidineacetic acid