You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [3-methoxy-1-[4-(3-methyl-5-oxo-7H-imidazo[1,5-c]imidazol-6-yl)piperazin-1-yl]-1-oxopropan-2-yl]urea .
user
C15H23N7O4
assistant