This invention provides substituted fused bicyclic compounds as
kinase inhibitors and their applications, said substituted fused bicyclic compounds having the structure shown in Formula IIc, wherein R0, A1, A2, B1-B3, D1-D3, R7, and R8 are as defined herein. Compounds of Formula IIc are NUAK1 / 2 inhibitors. Therefore, the compounds of this invention can be used for the treatment and prevention of NUAK1 / 2-mediated diseases, disorders, and conditions, such as
cancer, and for the preparation of medicaments for the treatment and prevention of NUAK1 / 2-mediated diseases, disorders, and conditions. (IIc)