You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-methyl-N-[(4-propan-2-yl-1,2,4-triazol-3-yl)methyl]-9H-fluorene-9-carboxamide using the IUPAC nomenclature.
user
C21H22N4O
assistant