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 3-thia-20-azapentacyclo[11.7.0.02,6.07,12.014,19]icosa-1(13),2(6),4,7,9,11,14,16,18-nonaene is given. What is its corresponding molecular formula?
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C18H11NS
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