You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[[(2R,3S)-2-(2-methylpyrazol-3-yl)oxan-3-yl]methyl]imidazo[1,2-a]pyridine-2-carboxamide .
user
C18H21N5O2
assistant