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-[8-[(2S)-2-amino-4-methylpentoxy]-7-(difluoromethyl)-1,5-dihydrochromeno[4,3-c]pyridin-2-yl]acetamide ?
user
C21H27F2N3O3
assistant