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)-5-(furan-3-ylmethyl)-1-propan-2-yl-2-(1,2,4-triazol-1-ylmethyl)-3,3a,4,6,7,7a-hexahydro-2H-pyrrolo[3,2-c]pyridine .
user
C18H27N5O
assistant