You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (3R)-7-[4-[(4-chloro-3,5-difluorophenoxy)-difluoromethyl]-3,5-difluorophenyl]-3-(4-ethylcyclohexyl)-6-fluoro-3,4-dihydro-2H-chromene into molecular formula.
user
C30H26ClF7O2
assistant