You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3,4,6,7-tetramethyl-1,2,3,4,4a,5a,6,7,8,9,9a,9b-dodecahydrodibenzothiophene into molecular formula.
user
C16H28S
assistant