You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (1Z)-1-(aminomethylidene)-3-[[(4S)-4-(2-cyano-6-azaspiro[2.5]octan-6-yl)-3,4-dihydro-2H-chromen-7-yl]sulfonyl]thiourea is given. What is its corresponding molecular formula?
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C19H23N5O3S2
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