You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule [(2R)-1-(2,2-dimethyl-3-oxo-4H-quinoxalin-1-yl)-1-oxopropan-2-yl] 1H-indole-2-carboxylate ?
user
C22H21N3O4
assistant