You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[4-[3-[4-(4-amino-6-ethyl-2-methylpyrimidin-5-yl)phenoxy]propoxy]phenyl]-6-ethylpyrimidine-2,4-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H33N7O2
assistant