Eisai Company, Limited

Megumi Ikemori

Norio Minami

Fumihiro Ozaki

Toshiaki Ogawa

Yasuhiro Kabasawa

Keiji Ishibashi

Takanori Kawamura

A butenoic or propenoic acid derivative having the following formula in which G is an aryl or a heterocyclic ring, R11 and R12 are hydroben or an alkyl, X is sulfur or oxygen, R2 and R3 are hydrogen, an substituent such as an alkyl and J is pyridyl or phenyl having substituents and a heterocyclic ring may be formed between R2, R3 and J is provided here and is useful in the pharmacological field. ##STR1##

Butenoic or propenoic acid derivative

A butenoic or propenoic acid derivative having the following formula in which G is an aryl or a heterocyclic ring, R11 and R12 are hydrogen or an alkyl, X is sulfur or oxygen, R2 and R3 are hydrogen, an substituent such as an alkyl and J is pyridyl or phenyl having substituents and a heterocyclic ring may be formed between R2, R3 and J is provided here and is useful in the pharmacological field. ##STR1##

Butenoic or propenoic acid derivatives

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Ibaraki, Japan

Megumi Ikemori