The invention relates to benzoxazepin compounds of Formula Iincluding stereoisomers, geometric isomers, tautomers, or pharmaceuti-cally acceptable salts thereof, wherein: Z1is CR1or N; Z2is CR2or N; Z3is CR3or N; Z4is CR4or N; and B is a pyrazolyl, imidazolyl, or triazolyl ring which compounds have anti-cancer activity, and more specifically, inhibit PI3 kinase activity.本發明係關於式I之苯并氧氮呯化合物,包括其立體異構體、幾何異構體、互變異構體或醫藥學上可接受之鹽,其中:Z1為CR1或N;Z2為CR2或N;Z3為CR3或N;Z4為CR4或N;且B為吡唑基、咪唑基或三唑基環,該等化合物具有抗癌活性,且更特定言之抑制PI3激酶活性。