You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (E)-3-(2-methylpyrazol-3-yl)-1-(4-pyrazol-1-yl-3,4-dihydro-1H-isoquinolin-2-yl)prop-2-en-1-one into molecular formula.
user
C19H19N5O
assistant