You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-tert-butyl-2'-(3,3-dimethylbut-1-ynyl)-7'-pyrimidin-5-ylspiro[5H-1,3-thiazole-4,9'-xanthene]-2-amine into molecular formula.
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C29H30N4OS
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