Xanthines (1H-purine-2, 6 (3H, 7H)-diones) yog purine raws li ntuj heterocyclic alkaloids. Lawv tau pom thawj zaug hauv 1817 los ntawm German chemist Emil Fisher thiab tom qab ntawd lub npe 'xanthine' tau tsim nyob rau xyoo 1899 [13].
Xanthine pom nyob rau hauv lub cev qhov twg?
Xanthine: Ib yam khoom pom muaj nyob hauv caffeine, theobromine, thiab theophylline thiab ntsib hauv tshuaj yej, kas fes, thiab colasTshuaj, xanthine yog purine. Muaj kab mob caj ces ntawm xanthine metabolism, xanthinuria, vim tsis muaj enzyme, xanthine dehydrogenase, xav tau los ua xanthine hauv lub cev.
Puas xanthines phem?
Methylxanthines yog metabolized los ntawm cytochrome P450 hauv daim siab. Yog tias nqos, nqus tau, lossis raug rau qhov muag ntau ntau, xanthines tuaj yeem tsim teeb meem, thiab yuav ua rau muaj kev tsis haum tshuaj yog tias siv tshuaj pleev.
xanthine siv rau dab tsi?
Kev siv loj ntawm xanthine derivatives yog rau relief of bronchospasm los ntawm hawb pob los yog mob ntsws obstructive ntsws. Cov xanthine siv dav tshaj plaws yog theophylline.
peb xanthines yog dab tsi?
Peb xanthines, caffeine, theophylline thiab theobromine, tshwm sim hauv cov nroj tsuag. Lawv zoo sib xws tab sis txawv qhov muaj zog: Tshuaj yej muaj caffeine thiab theophylline.
