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 5-(2,2-difluoro-1,3-benzodioxol-5-yl)-6,7-dimethyl-6,7-dihydro-5H-cyclopenta[b]pyridine;ethane .
user
C19H21F2NO2
assistant