You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4-ethyl-2,3-dihydroquinoxalin-1-yl)-[(3R,4S)-4-(1-methylpyrazol-4-yl)pyrrolidin-3-yl]methanone;dihydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H27Cl2N5O
assistant