Heterocycles
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Azaindoles 2 items
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Indoles 5 items
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Others 1 item
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Pyrazoles 4 items
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Pyridines 18 items
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Pyridones 11 items
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Pyrimidines 3 items
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Pyrroles 2 items
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Tetrahydrofurans 1 item
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Triazines 1 item