You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(4S)-4-benzyl-2-hydroxy-1,3-oxazolidin-3-yl]-2-[(1R,3S)-3-methyl-2,3-dihydro-1H-inden-1-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H25NO3
assistant