| Sentit | Natural bases containing nitrogen found in plants. |
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| Específic | atropina | A poisonous crystalline alkaloid extracted from the nightshade family |
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| brucina | A bitter alkaloid poison resembling strychnine and extracted from nux vomica |
| cafeïna | A bitter alkaloid found in coffee and tea that is responsible for their stimulating effects |
| cinconina | An alkaloid derivative of the bark of cinchona trees that is used as an antimalarial drug |
| curare, tubocurarina | A toxic alkaloid found in certain tropical South American trees that is a powerful relaxant for striated muscles |
| efedrina | white odorless powdered or crystalline alkaloid from plants of the genus Ephedra (especially Ephedra sinica) or made synthetically |
| ergonovina | An alkaloid derived from ergot (trade name Ergotrate Maleate) that is less toxic than ergot |
| ergotamina | An alkaloid derived from ergot that is less toxic than ergot |
| escopolamina, hioscina | An alkaloid with anticholinergic effects that is used as a sedative and to treat nausea and to dilate the pupils in ophthalmic procedures |
| estricnina | An alkaloid plant toxin extracted chiefly from nux vomica |
| fisostigmina | Used in treatment of Alzheimer's disease and glaucoma |
| hiosciamina | A poisonous crystalline alkaloid (isometric with atropine but more potent) |
| nicotina | An alkaloid poison that occurs in tobacco |
| pilocarpina | cholinergic alkaloid used in eyedrops to treat glaucoma |
| pseudoefedrina | poisonous crystalline alkaloid occurring with ephedrine and isomorphic with it |
| General | compost orgànic | Any compound of carbon and another element or a radical |
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| Anglès | alkaloid |
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| Espanyol | alcaloide |
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