You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named propan-2-yl (Z)-5-methyl-3-sulfanyl-2-[[(3Z)-3-sulfanylhexa-3,5-dien-2-ylidene]amino]hex-2-enoate by IUPAC nomenclature, provide its molecular formula.
user
C16H25NO2S2
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