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 (1R,2S)-N-[8-amino-6-(2-ethylpyrrolidin-1-yl)-2,7-naphthyridin-3-yl]-2-methylcyclopropane-1-carboxamide .
user
C19H25N5O
assistant