You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(2-methylcyclohexyl)oxy-N-[[2-(4-methylpiperazin-1-yl)pyrimidin-5-yl]methyl]ethanamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H33N5O
assistant