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What is the molecular formula of the molecule identified by N-[(2S)-4-chloro-1-(4-chlorophenyl)-1-oxobutan-2-yl]-N-[(1S,2R,6R,7S,8R,10R)-3,5-dioxo-4-azatetracyclo[5.3.2.02,6.08,10]dodec-11-en-4-yl]-4-nitrobenzamide ?
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C28H23Cl2N3O6
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