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 (4S,9aS)-N-[(4R)-3,4-dihydro-2H-chromen-4-yl]-4-[[(2S)-2-(methylamino)propanoyl]amino]-5-oxo-3,4,7,8,9,9a-hexahydro-2H-pyrrolo[2,1-b][1,3]oxazepine-7-carboxamide into molecular formula.
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C22H30N4O5
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