1,4-Dihydro-1-[2-(2-methoxyphenyl)-2-[(tetrahydro-2H-pyran-4-yl)oxy]ethyl]-α,α-dimethyl-6-(2-oxazolyl)-2,4-dioxothieno[3,2-d]pyrimidine-3(2H)-acetic Acid is a compound that can be synthesized from 3-Amino-2-methoxycarbonylthiophene (A612075), a useful synthetic intermediate.