You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (7R,8aS)-2-[1-[(E)-1-[4-[[3-[(1R)-1-(4-fluorophenyl)ethyl]imidazol-4-yl]methyl]piperazin-1-yl]sulfonylprop-1-enyl]sulfanylcyclobut-2-en-1-yl]-4-methyl-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-7-ol by IUPAC nomenclature, provide its molecular formula.
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C31H43FN6O3S2
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