You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 6-[(4,5-dichloro-2-oxo-1,3-thiazol-3-yl)methyl]-5-[(4S)-4-hydroxy-1,2-oxazolidine-2-carbonyl]-3-methyl-1-(2-methylpropyl)thieno[2,3-d]pyrimidine-2,4-dione .
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C19H20Cl2N4O6S2
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