You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-chlorophenyl)-N-[(2R)-2-(dimethylamino)-2-thiophen-3-ylethyl]-5-(trifluoromethyl)pyrazole-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H18ClF3N4OS
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