| 11. | Heterocyclic compounds may be also present.
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| 12. | The compound is classified as benzene derivative and a heterocyclic compound containing the methylenedioxy functional group.
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| 13. | The compound is used as a precursor to heterocyclic compounds by reaction with ketones and aldehydes.
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| 14. | He conducted studies on the condensation of aldehydes with ammonia as well as research of heterocyclic compounds.
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| 15. | "' Benzofuran "'is the heterocyclic compound consisting of fused benzene and furan rings.
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| 16. | Nucleotides are heterocyclic compounds, that is, they contain at least two different chemical elements as members of its rings.
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| 17. | "' Cinnoline "'is an aromatic heterocyclic compound with the formula C 8 H 6 N 2.
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| 18. | "' Isonipecotic acid "'is a heterocyclic compound which acts as a GABA A receptor partial agonist.
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| 19. | A "'thienodiazepine "'is a heterocyclic compound containing a diazepine ring fused to a thiophene ring.
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| 20. | "' Dihydrothiophene "'is a heterocyclic compound and an organosulfur compound with the formula SC 4 H 6.
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