You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-chlorophenyl)-2-[[5-(furan-2-yl)-4-(oxolan-2-ylmethyl)-1,2,4-triazol-3-yl]sulfanyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19ClN4O3S
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