THE PRESENT INVENTION RELATES TO A COMPOUND OR A PHARMACOLOGICALLY ACCEPTABLE SALT THEREOF HAVING SUPERIOR GLUCOKINASE ACTIVATING ACTIVITY, AND IS A COMPOUND REPRESENTED BY GENERAL FORMULA (I), OR PHARMACOLOGICALLY ACCEPTABLE SALT THEREOF: [WHEREIN, A REPRESENTS, FOR EXAMPLE, AN OXYGEN ATOM OR SULFUR ATOM, R1 REPRESENTS, FOR EXAMPLE, A C1-C6 ALKYL GROUP, A C1-C6 ALKOXY GROUP OR A C1-C6 HALOGENATED ALKYL GROUP, A AND R1 TOGETHER WITH THE CARBON ATOM BONDED THERETO FORM A HETEROCYCLIC GROUP THAT MAY BE SUBSTITUTED WITH 1 TO 3 GROUP(S) INDEPENDENTLY SELECTED FROM SUBSTITUENT GROUP α, R2 REPRESENTS A PHENYL GROUP THAT MAY BE SUBSTITUTED WITH 1 TO 5 GROUP(S) INDEPENDENTLY SELECTED FROM SUBSTITUENT GROUP α OR A HETEROCYCLIC GROUP THAT MAY BE SUBSTITUTED WITH 1 TO 3 GROUP(S) INDEPENDENTLY SELECTED FROM SUBSTITUENT GROUP α, R3 REPRESENTS A HYDROXY GROUP OR A C1-C6 ALKOXY GROUP, AND SUBSTITUENT GROUP α CONSISTS OF, FOR EXAMPLE, A HALOGEN ATOM, A C1-C6 ALKYL GROUP, A C1-C6 ALKYL GROUP SUBSTITUTED WITH 1 OR 2 HYDROXY GROUP(S), A C1-C6 ALKYLSULFONYL GROUP, AND A GROUP REPRESENTED BY THE FORMULA -V-NR5R6 (WHEREIN, V REPRESENTS A CARBONYL GROUP OR A SULFONYL GROUP, AND R5 AND R6 MAY BE THE SAME OR DIFFERENT AND RESPECTIVELY REPRESENT A HYDROGEN ATOM OR A C1-C6 ALKYL GROUP, OR R5 AND R6 TOGETHER WITH THE NITROGEN ATOM BONDED THERETO FORM A 4- TO 6-MEMBERED SATURATED HETEROCYCLE THAT MAY BE SUBSTITUTED WITH 1 OR 2 GROUP(S) INDEPENDENTLY SELECTED FROM A C1-C6 ALKYL GROUP AND A HYDROXY GROUP, AND THE 4- TO 6-MEMBERED SATURATED HETEROCYCLE MAY FURTHER CONTAIN ONE OXYGEN ATOM OR NITROGEN ATOM)].
