You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[(2S)-1-[(2S,4S)-4-ethyl-4-hydroxy-2-methyl-1-oxo-2,3a-dihydroimidazo[1,2-a]indol-3-yl]-2-(4-oxo-3H-quinazolin-2-yl)propan-2-yl]acetamide into molecular formula.
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C26H29N5O4
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