A compound of the formula (I): [wherein R1 is (substituted)
alkyl, alkoxy, phenyl, hetero ring etc.; A is bond, CO, SO2; R2 is H, (substituted)
alkyl etc.; D is alkylene etc.; E is COO, OCO, O, S, SO, SO2 etc.; R3 is (substituted)
alkyl, carbocyclic ring, hetero ring; J is O, NR16 (R16 is H, substituted alkyl); R4 is (substituted) alkyl, carbocyclic ring, hetero ring.] or non-toxic salt thereof, and an N-type
calcium channel blocker comprising it as an
active ingredient.The compounds of the formula (I) possess an inhibitory action on N-type
calcium channel, so they are useful as agent for the prevention and / or treatment of cerebral infarct, transient ischemic
attack, encephalomyelopathy after cardiac operation, spinal
angiopathy, hypertension with stress,
neurosis or
epilepsy etc. or agent for the treatment of pain.