You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-ethyl-9-(2-methoxypropyl)-4-methyl-N-(2,4,6-trimethylphenyl)-5,6,7,8-tetrahydropyrimido[4,5-b]azepin-2-amine into its molecular formula.
user
C24H36N4O
assistant