You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-methyl-2-(2-methylprop-2-enylsulfanyl)-6-oxo-5H-pyrimidin-5-yl]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C11H14N2O3S
assistant