You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 1-[amino-[2-[(2R)-1,2-dihydroxypropan-2-yl]-1,3-thiazol-5-yl]-oxo-lambda6-sulfanylidene]-3-(4,4-dimethyl-2-azatricyclo[7.3.0.03,7]dodeca-1(9),2,7-trien-8-yl)urea is given. What is its corresponding molecular formula?
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C20H27N5O4S2
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