You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (3aS,4R,7aS)-6-[(3-methoxyphenyl)methyl]-N-pyridin-3-yl-3,3a,4,5,7,7a-hexahydro-2H-furo[2,3-c]pyridine-4-carboxamide .
user
C21H25N3O3
assistant