Amino acid derivatives and pharmaceutical composition comprising, as active ingredients, them

摘要

Compounds represented by general formula (I) and salts thereof, wherein each symbol is as defined in the specification. Because of inhibiting the N type calcium channel, the compounds of general formula (I) are useful as preventives and/or remedies for brain infarction, transient ischemic attack, cerebrospinal failure following heart operation, spinal vascular failure, stress hypertension, neurosis, epilepsy, asthma, frequent urination, or analgesics.