You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(4R)-5-acetyl-4-(4-hydroxy-3-methoxyphenyl)-6-methyl-1,4-dihydropyrimidin-2-yl]cyanamide into molecular formula.
user
C15H16N4O3
assistant