methylxanthine

methylxanthine
meth·yl·xan·thine .meth-əl-'zan-.thēn n a methylated xanthine derivative (as caffeine, theobromine, or theophylline)

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meth·yl·xan·thine (meth″əl-zanґthēn) any of the methylated derivatives of xanthine, including caffeine, theobromine, and theophylline and their derivatives. Methylxanthines relax smooth muscle, stimulate the central nervous system and cardiac muscle, and produce diuresis; they are used clinically as bronchodilators.

Medical dictionary. 2011.

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  • Methylxanthine — Méthylxanthine Une méthylxanthine est une base xanthinique sur laquelle un ou plusieurs hydrogènes en positions 1, 3 ou 7 est substitué par un groupements méthyl . On compte parmi celles ci : la caféine (1,3,7 triméthylxanthine) la… …   Wikipédia en Français

  • Méthylxanthine — Une méthylxanthine est une base xanthinique sur laquelle un ou plusieurs hydrogènes en positions 1, 3 ou 7 est substitué par un groupements méthyl . On compte parmi celles ci : la caféine (1,3,7 triméthylxanthine) la théophylline (1,3… …   Wikipédia en Français

  • methylxanthine — noun Date: 1949 a methylated xanthine derivative (as caffeine, theobromine, or theophylline) …   New Collegiate Dictionary

  • Methylxanthine — Strukturformel Allgemeines Name Xanthin Andere Namen 2,6 Dihydroxypurin 2,6(1H,3H) Purindion …   Deutsch Wikipedia

  • methylxanthine — noun Any of a group of compounds formed through the methylation of xanthines, such as caffeine …   Wiktionary

  • methylxanthine — ¦ ̷ ̷  ̷ ̷ ¦ ̷ ̷ ˌ ̷ ̷ noun Etymology: methyl + xanthine : a methylated xanthine derivative (as caffeine, theobromine, or theophylline) …   Useful english dictionary

  • Theobromine synthase — In enzymology, a theobromine synthase (EC number|2.1.1.159) is an enzyme that catalyzes the chemical reaction:S adenosyl L methionine + 7 methylxanthine ightleftharpoons S adenosyl L homocysteine + 3,7 dimethylxanthineThus, the two substrates of… …   Wikipedia

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