| abstract |
Compounds represented by the general formula (1):n n(where R 1 and R 2 are typically a hydrogen atom; R 3 and R 4 arentypically a hydrogen atom or a lower alkyl group; R 5 isntypically a hydrogen atom; X 1 , X 2 , X 3 and X 4 are typically anhydrogen atom or a lower alkoxy group; A is typically annoptionally substituted pyridine ring; m and n are each 0 orn1) have an NOS inhibiting activity and are useful asntherapeutics of cerebrovascular diseases and othernpharmaceuticals. |