| 摘要 |
Purin-6-one derivatives of formula (I) are new: R<1> = H or 1-8C alkyl; R<2> = 1-4C acyl or 1-8C alkyl (optionally substituted); A = 1-6C alkylene or 2-6C alkenylene; D, L = 6-10C aryl or 5-7 membered aromatic (optionally benzo-condensed) heterocycle with 1-3 heteroatoms (N, S and/or O) (optionally substituted by 1-3 halo, OH, NO2, CF3, carboxy, 1-6C alkyl, 1-6C alkoxy, 1-6C alkoxycarbonyl, etc.; or D = a group or formula (D); E = CH2YZ; Y = a bond, O, S or NH; Z = 1-5C alkylene. |
