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)-N-(2,3-dihydro-1-benzofuran-5-yl)-1-(3-nitroimidazo[1,2-a]pyridin-2-yl)piperidine-2-carboxamide ?
user
C21H21N5O4
assistant