8-Cyclopentyl-1,3-dimethylxanthine (8-Cyclopentyltheophylline, 8-CPT, CPX) is a drug which acts as a potent and selective antagonist for the adenosine receptors, with some selectivity for the A1 receptor subtype, as well as a non-selective phosphodiesterase inhibitor. It has stimulant effects in animals with slightly higher potency than caffeine.

CAS：35873-49-5
中文别名：8-环戊-1,3-二甲基黄嘌呤;
英文别名：8-Cyclopentyltheophylline CPT;8-Cyclopentyl-1,3-dimethylxanthine;8-Cyclopentyl theophylline;Theophylline,8-cyclopentyl;cyclopentyl teophylline;1,3-dimethyl-8-cyclopentylxanthine;Xanthine,8-cyclopentyl-1,3-dimethyl;8-cyclopentyl-1,3-dimethyl-3,7-dihydro-purine-2,6-dione;
分子式：C12H16N4O2
分子量：248.281
精确质量：248.127
Psa：72.68
Logp：0.6179

密度：1.332g/cm3
沸点：513.1ºC at 760mmHg
熔点：250-252ºC
闪点：264.1ºC
折射率：1.607

RTECS号：XH5093600
WGK Germany：3
海关编码：2933990090