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 N-[(2S,3R)-4-[[(4S)-6-(2,2-dimethylpropyl)spiro[3,4-dihydropyrano[2,3-b]pyridine-2,1'-cyclobutane]-4-yl]amino]-3-hydroxy-1-(2-oxo-1H-pyridin-4-yl)butan-2-yl]acetamide into molecular formula.
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C27H38N4O4
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