You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3R,4R)-4-(4-methylpiperazin-1-yl)oxolan-3-yl]-1H-benzimidazole-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H23N5O2
assistant