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 1-[(4aS,8aR)-4-(1,2-oxazole-5-carbonyl)-8-pyrrolidin-1-yl-3,4a,5,7,8,8a-hexahydro-2H-pyrano[3,4-b]pyrazin-1-yl]-2-(3,4-dichlorophenyl)ethanone into molecular formula.
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C23H26Cl2N4O4
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