A compound having GSK-3 inhibitory activity. A1 and A3 are a
single bond, an
aliphatic hydrocarbon group; A2 and A4 are a
single bond, CO, COO, CONR, O, OCO, NR, NRCO, NRCOO, etc.; G1 is a
single bond, an
aliphatic hydrocarbon,
aromatic hydrocarbon, heterocyclic; G2 is H, an
aliphatic hydrocarbon, an alicyclic
hydrocarbon, an
aromatic hydrocarbon, heterocyclic; A5 is a single bond, NR; R2 is H,
halogen, an aliphatic
hydrocarbon, alicyclic
hydrocarbon,
aromatic hydrocarbon, heterocyclic; A6 is a single bond, NR, CO, NRCO, NRCONR, CONR, COO, O, etc.; R3 is H,
halogen, nitro, saturated aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, heterocyclic; and R3 may be a
trimethylsilyl, formyl, acyl, carboxyl, alkoxylcarbonyl, carbamoyl, alkylcarbamoyl, or cyano group when A6 is CR═CR or C≡C, wherein R is H or an lower aliphatic hydrocarbon group.