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 [(2S)-oxolan-2-yl]methyl (4S)-4-(4-ethoxy-3-methoxyphenyl)-6-methyl-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate ?
user
C20H26N2O6
assistant