You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1S,2S,4S)-4-(2,3-dihydro-1-benzofuran-5-ylmethylcarbamoyl)-2-hydroxycyclopentyl]-5-methyl-1,2-oxazole-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H23N3O5
assistant