You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl (1S,3S)-3-[[6-(2,5-dimethylpyrrol-1-yl)-4-methylpyridin-2-yl]methoxy]cyclopentane-1-carboxylate .
user
C20H26N2O3
assistant