| 41. | Plants exclusively of the Capsicum genus produce capsaicinoids, which are alkaloids.
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| 42. | The distribution of alkaloids within tissues may also reflect defence against parasites.
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| 43. | The alkaloids are a class of chemical compounds containing a nitrogen ring.
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| 44. | Much of his subsequent work further developed understanding of the natural alkaloids.
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| 45. | Coniine eventually became the first of the alkaloids to be artificially synthesized.
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| 46. | Several pharmacologically active alkaloids have been detected in the plants.
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| 47. | Regrowth after grazing or mowing also shows a considerable increase in alkaloids.
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| 48. | The concentrations of alkaloids in all parts of the plant differ markedly.
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| 49. | The alkaloid content of dried foliage is about 44 mg / kg.
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| 50. | The alkaloids nigellicine, nigeglanine, and nigellidine are indazoles.
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