You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[5-(2,2-dihydroxyethylsulfanyl)-1,3-thiazol-2-yl]-1-ethyl-1-[1-(pyridine-3-carbonyl)pyrrolidin-3-yl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23N5O4S2
assistant