You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named bismuth;5,5-dibutyl-2-sulfanyl-2-sulfanylidene-1,3,2lambda5-dioxaphosphinane;2-ethylhexanoate by IUPAC nomenclature, provide its molecular formula.
user
C30H61BiO6P2S4+2
assistant