Fujisawa Pharmaceutical Company, Ltd.

Shinya Watanabe

Hirokazu Tanaka

Keiji Hemmi

Satoshi Okada

Kozo Sawada

Norihiko Shimazaki

Akio Kuroda

Akihiko Sawada

Masashi Hashimoto

Masahiro Neya

Hiroshi Marusawa

Heterobicyclic derivatives

Pyrido (2,3-B) pyrazine derivatives

Process for the preparation of indolizine derivatives

Indole derivatives useful as testosterone 5.alpha.-reductase inhibitors

This invention relates to new amino acid derivatives and pharmaceutically acceptable salts thereof, wherein the amino acid derivatives are useful in the treatment and/or prevention of hypertension, heart failure, renal diseases or glaucoma.

Amino acid derivatives, a process for the preparation thereof and

This invention relates to heterocyclic derivatives useful for treating or preventing testosteron 5.alpha.-reductase mediated diseases such as alopecia, ache, prostatism and the like, which can be represented by the following formula: ##STR1## to a process for their production, to a pharmaceutical composition containing the same and to uses thereof.

Heterocyclic derivatives

Growing community of inventors

Tsukuba, Japan

Shinya Watanabe