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 [(5R)-2-[4-cyano-3-(trifluoromethyl)phenyl]-1,3-dihydroxy-4,7-dimethyl-5,6-dihydro-4,7-epoxyisoindol-5-yl] N-ethylcarbamate .
user
C21H20F3N3O5
assistant