You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule ethyl (3S)-1-[1-(6-thiophen-2-ylpyridazin-3-yl)piperidine-4-carbonyl]piperidine-3-carboxylate into molecular formula.
user
C22H28N4O3S
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