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What is the molecular formula of the molecule identified by (1R,2S,6R,7R,8R,10S)-4-[(Z)-(2,4-dihydroxyphenyl)methylideneamino]-4-azatetracyclo[5.3.2.02,6.08,10]dodec-11-ene-3,5-dione ?
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C18H16N2O4
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