You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,3aS,4R,5S,7aS)-6,6-difluoro-3,5-dimethyl-4-[(E)-2-[5-(2-methylphenyl)pyridin-2-yl]ethenyl]-7a-(1,3-thiazol-2-ylamino)-3a,4,5,7-tetrahydro-3H-2-benzofuran-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H27F2N3O2S
assistant