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 N-[(4R)-6-oxo-4-(2,3,4-trimethoxyphenyl)-4,5-dihydro-1H-pyrimidin-2-yl]pyridine-3-carboxamide .
user
C19H20N4O5
assistant