You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(1,3-dioxo-4,5,6,6a-tetrahydro-3aH-cyclopenta[c]pyrrol-2-yl)-1-methylpyrazole-4-carbothioamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H14N4O2S
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