You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-ethoxy-9-methyl-6-[[4-[3-(methylamino)propoxy]phenyl]methyl]-7,8-dihydropyrimido[4,5-e][1,4]diazepin-5-one ?
user
C21H29N5O3
assistant