You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(6-benzyl-5,7-dimethyl-4-oxopyrrolo[3,4-d]pyridazin-3-yl)-N-(pyridin-3-ylmethyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H23N5O2
assistant