Description: Theophylline (1,3-Dimethylxanthine) is a methyl xanthine derivative from tea with diuretic, smooth muscle relaxant, bronchial dilation, cardiac, and central nervous system stimulant activities. It inhibits the 3', 5'-cyclic nucleotide phosphodiesterase that degrades cyclic AMP, thus potentiating the...

Theophylline is a methylxanthine alkaloid that is a competitive inhibitor of phosphodiesterase (PDE, Ki = 100 µM). It is also a non-selective antagonist of adenosine A receptors (Ki = 14 µM for A1 and A2). Theophylline induces relaxation of feline bronchiole smooth muscle precontracted with acetylcholine (EC40 = 117...

An inhibitor of cyclic phosphodiesterase. It has been found to decrease incidence and multiplicity of tumors in the brain, spinal cord, peripheral nerves, and kidneys. Adenosine A1/A2a receptor antagonist.

Theophylline (Cay-32993) is an analytical reference standard categorized as a caffeine metabolite. Theophylline has been found as an adulterant in seized heroin samples. It has also been used as a marker of authentic human urine specimens. This product is intended for use in analytical forensic applications. This...