You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-ethyl-7-methoxy-N-(3-methoxyphenyl)-N,1-dimethyl-4-[(E)-prop-1-enyl]quinazolin-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H29N3O2
assistant