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Benzazepines |
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Benzimidazoles |
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Benzofurans |
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Benzopyrans - Compounds with a core of fused benzo-pyran rings. |
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Benzothiadiazines |
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Benzothiepins |
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Benzoxazoles |
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Benzoxepins |
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Indoles |
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Indolizines |
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Isoquinolines - A group of compounds with the heterocyclic ring structure of benzo(c)pyridine. The ring structure is characteristic of the group of opium alkaloids such as papaverine. (From Stedman, 25th ed) |
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Naphthyridines |
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Pteridines - Compounds based on pyrazino[2,3-d]pyrimidine which is a pyrimidine fused to a pyrazine, containing four NITROGEN atoms. |
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Purines - A series of heterocyclic compounds that are variously substituted in nature and are known also as purine bases. They include ADENINE and GUANINE, constituents of nucleic acids, as well as many alkaloids such as CAFFEINE and THEOPHYLLINE. Uric acid is the metabolic end product of purine metabolism. |
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Quinazolines |
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Quinolines |
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Quinolizines |
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Quinoxalines |
CANADIAN
MEDICAL GUIDE