You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[1-[4-(dimethylamino)-4-oxobutyl]pyrazol-3-yl]-2-oxo-1H-quinoline-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C19H21N5O3
assistant