You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[1-[4-(3-phenoxyanilino)pyrido[3,2-d]pyrimidin-6-yl]azetidin-3-yl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H28N6O3
assistant