You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-cyclohexyl-1-methyl-3-[3-oxo-3-(4-pyrimidin-2-ylpiperazin-1-yl)propyl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H30N6O2
assistant