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 N-[(1S)-1-(4-cyclopentyl-1,2,4-triazol-3-yl)ethyl]-3-(2-methyl-6-oxopyridin-1-yl)propanamide ?
user
C18H25N5O2
assistant