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 methyl 4-(2,3,4,4a,5,6,7,7a-octahydrocyclopenta[b]pyridin-1-yl)-2-methylbut-2-enoate .
user
C14H23NO2
assistant