Showa Denko Kabushiki Kaisha

Other

Shosuke Okamoto

Norio Ohno

Taketoshi Naito

Yoshio Okada

Yoshio Kimura

Morihiko Yamada

Hiroshi Nojima

Akiko Okunomiya

Yasuhiro Katsuura

Katsunori Oguro

Yumi Seki

Nobuyuki Hashizume

Takashi Shishikura

An anti-peptic ulcer composition containing, as an active ingredient, a therapeutically effective amount of a compound having the formula (I): ##STR1## wherein A represents H.sub.2 NCH.sub.2 --, ##STR2## B represents ##STR3## D and E each independently represent H, R,--R'CO.sub.2 R,--R'(OH)CO.sub.2 R, ##STR4## wherein X represents H, CONR.sub.2, CONHR, CONH.sub.2, CO.sub.2 H, CO.sub.2 R, or COR or --R'(CO.sub.2 R)--; R' represents a lower alkylene group and R represents a lower alkyl group; F represents H, ##STR5## or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier.

Anti-ulcer composition

A phenylalanine derivative having the formula (I): ##STR1## where R.sup.1 and R.sup.2 are independently hydrogen provided that both R.sup.1 and R.sup.2 are not hydrogen at the same time;

Phenylalanine derivative and proteinase inhibitor

A phenylalanine derivative having the formula (I): ##STR1## wherein A represents ##STR2## B represents ##STR3## wherein m is 0, 1, or 2 and n is 3, 4, or 5; X represents (a) hydroxy, (b) nitro, (c) amino, (d) phenoxy which may be substituted with (i) halogen or (ii) nitro, (e) c.sub.1 -C.sub.4 alkyloxy which may be substituted wit (i) phenyl or (ii) benzoyl, (f) benzoyl, (g) pyridyloxy which may be substituted with (i) halogen or (ii) nitro, or (h) c.sub.1 -C.sub.4 alkyl which may by substituted with halogen;

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Tokyo, Japan

Norio Ohno