You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(3,4-dimethoxyphenyl)methyl]-3-[2-(pyrazolo[1,5-a]pyridin-5-ylsulfamoyl)ethyl]urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H23N5O5S
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