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 (3aR,6R,7aS)-1-[[5-(3-fluorophenyl)-1H-pyrazol-4-yl]methyl]-3a,6-dimethoxy-3,4,5,6,7,7a-hexahydro-2H-indole .
user
C20H26FN3O2
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