摘要 |
Compounds of general formula (I), wherein R<SUP>4 </SUP>and R<SUP>5 </SUP>stand for hydrogen atom or form together an 1,3-butadienyl group, optionally substituted by a methylenedioxy group or one or more straight or branched C<SUB>1-4 </SUB>alkyl group, straight or branched C<SUB>1-4 </SUB>alkoxy group, hydroxy group or halogen atom; are strong adenosine A<SUB>3 </SUB>receptor ligands preferably antagonists. |