Nihon Nohyaku Co., Ltd.

Minoru Katoh

Hitoshi Kurono

Kuniaki Taninaka

Tatsuyoshi Sugimoto

Dithiolane derivatives represented by the formula (I): ##STR1## wherein R.sup.1 is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, a benzyl group or an alkoxyalkyl group and R.sup.2 is a cyano group, an alkylcarbonyl group, a benzylcarbonyl group, a phenylcarbonyl group, an alkoxycarbonyl group, a cycloalkyloxycarbonyl group, a benzyloxycarbonyl group, an alkenyloxycarbonyl group, an alkynyloxycarbonyl group or an alkoxyalkoxycarbonyl group, and an organic acid ester thereof; process for producing the same; and pharmaceutical composition for controlling liver diseases of human beings and animals containing the same.

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Fujiidera, Japan

Minoru Katoh