| abstract |
Compounds of formula (I), where preferably: A=a bridge of partial formula (II) or (III), R<1 >and R<2>=independently (substituted) alkyl, aryl or aralkyl, or together form a heterocycle, R<3>=H, -CO-Alkyl, or -CO-Aryl, R<4>=Aryl, -CO-O-Aryl or -CO-Aryl and R<5>=H, are potent inhibitors of NO-synthase and are suitable as pharmaceutical agents of prophylaxis and treatment of disease states associates with a disturbed NO metabolism. |