You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl 5-[(4-oxo-6-phenyl-3H-thieno[2,3-d]pyrimidin-2-yl)sulfanylmethyl]furan-2-carboxylate .
user
C19H14N2O4S2
assistant