You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[[(3S,4S)-4-ethyl-1-methylsulfonylpyrrolidin-3-yl]amino]-6-(1-methylpyrazol-4-yl)pyrrolo[1,2-b]pyridazine-3-carboxamide into its molecular formula.
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