You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3,18-ditert-butyl-7,14-dithiatetracyclo[18.4.1.05,24.016,21]pentacosa-1(24),2,4,16,18,20-hexaene into molecular formula.
user
C31H44S2
assistant