You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[5-[2-[3-[(3-chloro-1-benzothiophen-2-yl)methyl]oxiran-2-yl]ethenyl]-4-hydroxy-3,3-dimethyl-2-oxocyclopentyl]hept-5-enoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H31ClO5S
assistant