You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-[(5R)-3-(2,4,6-trimethylphenyl)-4,5-dihydro-1,2-oxazol-5-yl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid ?
user
C21H24N2O5
assistant