You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Can you give the molecular formula of the molecule 4-(4-hydroxy-3-methoxyphenyl)-3,5,8-trimethyl-1,4,4a,5,6,8a-hexahydropyrimido[4,5-d]pyrimidine-2,7-dione ?
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C16H22N4O4
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