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 (2S,3aR,7aS)-6-[(1-methylpyrazol-4-yl)methyl]-N-(2-methylpyridin-3-yl)-3,3a,4,5,7,7a-hexahydro-2H-furo[2,3-c]pyridine-2-carboxamide .
user
C19H25N5O2
assistant