You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1E,2E,4E)-1-[(E)-2-ethylbut-2-enylidene]-4-[(E)-2-methylsulfanylbut-2-enylidene]-2-propylidenecyclopentane by IUPAC nomenclature, provide its molecular formula.
user
C19H28S
assistant