You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-(4-methoxyphenyl)-4-[1-[[(2S)-oxolan-2-yl]methyl]tetrazol-5-yl]sulfanylthieno[2,3-d]pyrimidine into molecular formula.
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C19H18N6O2S2
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