You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2S)-1-hydroxypropan-2-yl]-3-[2-(2-propan-2-yl-1,3-thiazol-4-yl)ethyl]urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H21N3O2S
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