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 3-[3-(4-ethoxy-7,8-dihydro-5H-pyrido[4,3-d]pyrimidin-6-yl)propyl]imidazolidine-2,4-dione ?
user
C15H21N5O3
assistant