You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named ethyl (4R)-4-[4-[2-[(2Z)-2-[(5-bromothiophen-2-yl)methylidene]hydrazinyl]-2-oxoethoxy]-3-methoxyphenyl]-6-methyl-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C22H23BrN4O6S
assistant