Mitsubishi Petrochemical Company Limited

Nobuyoshi Maruyama

Hiroshi Iwane

Makoto Takeda

Masaki Saito

Hiroshi Taniguchi

Shoichi Seo

Shiroh Inui

Shin Kawano

Noriko Wada

Kazuaki Isomura

An optically active compound represented by formula (I): ##STR1## wherein R.sup.1 represents an alkyl group having from 6 to 18 carbon atoms or an alkoxy group having from 6 to 18 carbon atoms; A represents ##STR2## or ##STR3## wherein ring ##STR4## represents a nitrogen-containing hetero-aromatic ring; n and m each represents 0 or 1; R.sup.2 represents an alkyl group having from 1 to 12 carbon atoms; and C* is an asymmetric carbon atom. The compound of formula (I) exhibits excellent physicochemical stability, a low temperature range for the chiral smectic C phase when used either alone or in combination with other compounds, and a rapid response.

Optically active compound

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Tokyo, Japan

Nobuyoshi Maruyama