Disclosed herein are a novel 2-substituted adenosine derivative having the following formula [I]
wherein R represents a hydrogen atom or a hydroxyl group, m is an integer of 2 to 7, n is 0 or an integer of 1 to 3, and R¹, R² and R³, which may be the same or different, each independently represent a hydrogen atom, a hydroxy protective group or a phosphoric acid residue,
and salts thereof.
The above compounds are excellent in a circulation ameliorating effect such as a vasodepressor activity, and have high selectivity for A₂ receptors, but cause less undesirable side effects such as a suppressive effect on the heart. They are therefore effective when used in pharmaceutical compositions for circulatory diseases.
本文公开了具有下式[I]的新型 2-取代
腺苷衍
生物
其中 R 代表氢原子或羟基,m 为 2-7 的整数,n 为 0 或 1-3 的整数,R¹、R² 和 R³(可以相同或不同)各自独立地代表氢原子、羟基保护基团或
磷酸残基、
及其盐类。
上述化合物具有良好的改善血液循环的作用,如血管舒张活性,对 A₂受体具有高选择性,但对心脏的抑制作用等不良副作用较小。因此,将它们用于治疗循环系统疾病的药物组合物中非常有效。