Kyowa Hakko Kogyo Co., Ltd.

Takahiro Moriyama

Motoo Yamasaki

Keiichi Yano

Akira Karasawa

Haruki Takai

Hiromi Nonaka

Shigeki Fujiwara

Kozo Yao

Yuko Okamura

Masaaki Ando

Disclosed are quinazoline derivatives represented by formula (I): wherein R.sup.1 represents hydrogen, lower alkyl, alkenyl, or aralkyl; R.sup.2, R.sup.3, R.sup.4, and R.sup.5 represent hydrogen, lower alkyl, lower alkoxy, lower alkanoyl, or the like; R.sup.6, R.sup.7, R.sup.8, and R.sup.9 represent hydrogen, lower alkyl, lower alkoxy, aralkyloxy, or the like, or any adjoining two of them are combined to form methylenedioxy or the like; R.sup.10 represents hydrogen, lower alkyl, or the like; R.sup.11 and R.sup.12 represent hydrogen, lower alkyl, cycloalkyl, phenyl, or aralkyl, or R.sup.11 and R.sup.12 are combined together with N to form a heterocyclic group; and n represents 0, 1 or 2, and pharmaceutically acceptable salts thereof. These compounds have adenosine uptake inhibitory activity and are useful for the protection of myocardium and for the prevention or treatment of renal diseases such as nephritis and diabetic nephropathy.

Quinazoline derivatives

Oxyntomodulin peptide having cardiotonic activity and insulin

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Shizuoka, Japan

Takahiro Moriyama