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Caffeine is xanthine alkaloid that occurs naturally in seeds, leaves and fruit of several plants and trees that acts as a natural pesticide. Caffeine is a major component of coffee, tea and chocolate and in humans acts as a central nervous system (CNS) stimulant.
- Pharmacology
Caffeine (1,3,7-trimethylxanthine) is a plant alkaloid with...
- Pharmacology
Caffeine is a bitter, white crystalline purine, a methylxanthine alkaloid, and is chemically related to the adenine and guanine bases of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
1 lut 2008 · Details of the recently elucidated biosynthetic pathways of caffeine and related purine alkaloids are reviewed. The main caffeine biosynthetic pathway is a sequence consisting of xanthosine → 7-methylxanthosine → 7-methylxanthine → theobromine → caffeine.
Caffeine (1,3,7-trimethylxanthine) is a plant alkaloid with a chemical structure of C 8 H 10 N 4 O 2 (see Figure 2–1) and a molecular weight of 194.19. In pure form, it is a bitter white powder. Structurally, caffeine (and the other methylxanthines) resembles the purines.
1 kwi 2024 · It is considered to be an alkaloid compound as it is a metabolite of nitrogen metabolism [10]. Caffeine is a heterocyclic organic compound with a purine base. The chemical structure of caffeine, with the purine base highlighted in a box is shown in Fig. 1 below.
1 sty 2015 · Caffeine (1,3,7-trimethylxanthine) is the main active ingredient of coffee. It is a natural alkaloid that, together with theophylline (1,3-dimethylxanthine), theobromine (3,7-dimethylxanthine), and paraxanthine (1,7-dimethylxanthine), belongs to methylxanthines.
14 wrz 2024 · Caffeine is an alkaloid with a purine structure and has been well known for centuries due to its presence in popular drinks—tea and coffee. However, the structural and spectroscopic parameters of this compound, as well as its chemical and biological activities, are still not fully known.
