You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule ethyl 5-methyl-4-oxo-2-[2-[3-(trifluoromethyl)phenyl]ethenyl]-3H-thieno[2,3-d]pyrimidine-6-carboxylate ?
user
C19H15F3N2O3S
assistant