| 21. | The modified Danheiser benzannulation allows the synthesis of polycyclic aromatic and heteroaromatic systems.
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| 22. | Other polycyclic aromatics undergo anthracene-like photocycloaddition, such as acridizinium salts.
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| 23. | Words like particulates, benzene and polycyclic aromatic hydrocarbons pop up in her speech.
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| 24. | Hydrocarbons are also abundant in nebulae forming polycyclic aromatic hydrocarbon ( PAH ) compounds.
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| 25. | Tobacco smoke contains over fifty known carcinogens, including nitrosamines and polycyclic aromatic hydrocarbons.
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| 26. | Polycyclic aromatic hydrocarbons ( PAH ), for example, are genotoxic via epoxidation.
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| 27. | Clearly, a strongly polycyclic group is polycyclic.
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| 28. | Clearly, a strongly polycyclic group is polycyclic.
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| 29. | "' Sanguinarine "'is a toxic polycyclic quaternary ammonium salt.
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| 30. | Type IV kerogen contains mostly decomposed organic matter in the form of polycyclic aromatic hydrocarbons.
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