Fujirebio Inc.

Yasushi Higashide

Tetsuaki Yamaura

Hiroshi Ikawa

Yoshiharu Nakashima

Michiyo Hizuka

Masato Nishimura

Yasuo Sekine

Eri Kojima

Yasuko Emoto

Disclosed is an azapeptide derivative represented by the formula (I): ##STR1## wherein A represents a direct bond, an .alpha.-amino acid or a residue of a dipeptide; R.sup.1 represents a hydrogen atom or a protective group for a terminal amino group; R.sup.2 represents a phenyl group or a phenyl group substituted by one or two substituents selected from the group consisting of a lower alkyl group, halogen atom, hydroxyl group which may be protected, nitro group, amino group which may be protected and perhalo lower alkyl group; and R.sup.3 represents a hydroxyl group or a protective group for a terminal carboxyl group, and a salt thereof, and an agent for curing nervous inflammation of respiratory apparatus, asthma and bronchospasm comprising the azapeptide derivative represented by the formula (I) or a salt thereof as an active ingredient.

Azapeptide derivative

Disclosed is an azapeptide derivative represented by the formula (I): ##STR1## wherein A represents a direct bond, an .alpha.-amino acid or a residue of a dipeptide; R.sup.1 represents a hydrogen atom or a protective group for a terminal amino group;

A naphthoic acid derivative represented by the following general formula or a salt thereof: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, a lower alkyl group, a lower alkoxy group, a lower alkanoyloxy group, a hydroxy-lower alkyl group, a lower alkoxy-lower alkyl group, a lower alkanoyloxy-lower alkyl group or an aralkyloxy group;

Naphthoic acid derivative

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Hachioji, Japan

Yasushi Higashide