You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[3-(dimethylamino)-2-oxoquinoxalin-1-yl]-N-[(4,5-dimethyl-1,3-thiazol-2-yl)methyl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H23N5O2S
assistant