The compounds of types A and C can readily be produced by reacting a carboxylic acid of formula ##STR17## with a chlorinating agent such as thionyl chloride, or the like to form an acid chloride of formula ##STR18## and reacting said acid chloride with an optically active alcohol ester of 4-hydroxybenzoic acid of formula ##STR19## or its substituted substance in the presence of a basic substance s