You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-oxo-5-[4-(6-pyrrolidin-1-ylpyridin-3-yl)indazol-1-yl]-2,3-dihydro-1,2-thiazol-3-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19N5O2S
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