Kyowa Hakko Kogyo Co., Ltd.

Iwao Kinoshita

Haruki Takai

Akio Ishii

Katsushige Gomi

Daisuke Machii

Nobuo Kosaka

Yasuo Onoda

Hiroyuki Ishida

Makoto Morimoto

Katsuichi Shuto

Koji Yamada

Hiroshi Kase

Yuji Nomoto

Tetsuji Ohno

Michio Ichimura

Kenji Matsuno

Joji Nakamura

Tomoko Ishikawa

Ken Nagashima

Nobuo Kasaka

Katsura Sugawara

Imidazoquinazoline derivatives

Benzenesulfonamide derivatives

A triphenylmethane derivative represented by the following general formula: ##STR1## exhibits bone absorption inhibiting effects and is useful as a medicament for treating osteoporosis.

Triphenylmethane derivatives

There is provided a pyridine derivative represented by the formula (I) ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents hydrogen or lower alkyl and each of R.sup.3 and R.sup.4 independently represents hydrogen, lower alkyl, alicyclic alkyl, substituted or unsubstituted polycyclic alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic group, or R.sup.3 and R.sup.4 are combined with nitrogen atom adjacent thereto to form a substituted or unsubstituted alicyclic heterocyclic group, or pharmaceutically acceptable salt thereof. The pyridine derivative exhibits bone resorption inhibiting effect and is useful as a medicament for treating osteoporosis.

Pyridine derivatives

A triphenylmethane derivative represented by the following general formula: ##STR1## exhibits born absorption inhibiting effects and is useful as a medicament for treating osteoporosis.

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Shizuoka, Japan

Iwao Kinoshita