You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [(2R)-1-ethoxy-1-oxopropan-2-yl] (4R)-4-(2-bromo-4-fluorophenyl)-6-(bromomethyl)-2-(1,3-thiazol-2-yl)-1,4-dihydropyrimidine-5-carboxylate;methane .
user
C21H22Br2FN3O4S
assistant