You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-N-(3-methylbutyl)-3-N,3-N-dipropyl-5,6,7,8-tetrahydroimidazo[1,5-a]pyridine-1,3-dicarboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H34N4O2
assistant