You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 5-[3-(2-methyl-1,3-dioxolan-2-yl)propyl]-3-phenyl-3,6,7,7a-tetrahydro-2H-pyrrolo[2,1-b][1,3]oxazole-5-carbonitrile into molecular formula.
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C20H26N2O3
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