You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-[4-(2-hydroxy-3,3-dimethylbutoxy)-3-methylphenyl]pentan-3-yl]-3a-methyl-6,8a-dihydrocyclohepta[b]thiophene-7-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H40O4S
assistant