You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,6S)-6-[[(2S)-2-acetamido-3-[4-(diethoxyphosphorylmethoxy)phenyl]propanoyl]amino]-N-[(2S)-1-(benzylamino)-3-(1H-imidazol-5-yl)-1-oxopropan-2-yl]-5-oxo-1,2,3,6,7,8,9,9a-octahydropyrrolo[1,2-a]azepine-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C39H52N7O9P
assistant