You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-4-[(5S)-2-(4-fluorophenyl)-5-[[2-methoxyethyl-[(3-methoxyphenyl)methyl]amino]methyl]-6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-3-yl]pyrimidin-2-amine;4-[(5S)-2-(4-fluorophenyl)-5-[[(3-fluorophenyl)methyl-methylamino]methyl]-6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-3-yl]-N-(2-methoxyethyl)pyrimidin-2-amine;4-[(5S)-2-(4-fluorophenyl)-5-[[(3-fluorophenyl)methyl-methylamino]methyl]-6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-3-yl]-N-[(4-methoxyphenyl)methyl]pyrimidin-2-amine;N-[4-[(5S)-2-(4-fluorophenyl)-5-[[2-methoxyethyl-[(3-methoxyphenyl)methyl]amino]methyl]-6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-3-yl]pyrimidin-2-yl]-N',N'-dimethylethane-1,2-diamine is the IUPAC name of a molecule. Please give its molecular formula.
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C123H137F6N25O6
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