You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-cyano-3-[2,5-dimethyl-1-(3-nitro-4-piperidin-1-ylphenyl)pyrrol-3-yl]-N-(thiophen-2-ylmethyl)prop-2-enamide by IUPAC nomenclature, provide its molecular formula.
user
C26H27N5O3S
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