You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-chloro-N-[(2S)-1-[2-[[(2R)-1-methoxypropan-2-yl]carbamothioyl]hydrazinyl]-4-methyl-1-oxopentan-2-yl]benzamide into molecular formula.
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C18H27ClN4O3S
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