You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 8-[(3R)-4-(4-methoxybutyl)-3-methylpiperazine-1-carbonyl]-1-[(3-methoxycyclobutyl)methyl]-7-methyl-5H-pyrazolo[4,3-c]quinolin-4-one .
user
C28H39N5O4
assistant