You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[(3R,3aR,6aS)-2-(4-chlorophenyl)-4,6-dioxo-3-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazol-5-yl]-4,5,6,7-tetrahydro-1-benzothiophene-3-carbonitrile is given. What is its corresponding molecular formula?
user
C26H20ClN3O3S
assistant