You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2R,5S)-5-[1-(3-cyano-6,7-dihydro-5H-cyclopenta[b]pyridin-2-yl)piperidin-4-yl]oxolane-2-carboxamide ?
user
C19H24N4O2
assistant