You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3aS,6R,7aS)-2-(2,2-dimethylpropyl)-3a-methyl-6-prop-1-en-2-yl-2-sulfanylidene-5,6,7,7a-tetrahydro-4H-benzo[d][1,3,2]oxathiaphosphole .
user
C15H27OPS2
assistant