You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[6-[3-[1-(4-amino-3-sulfanylphenyl)ethyl]pyrazol-1-yl]pyridin-3-yl]ethane-1,1,1-triol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H20N4O3S
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