The invention relates to benzoxazepin compounds of Formula Iincluding stereoisomers, geometric isomers, tautomers, or pharmaceutically acceptable salts thereof, wherein: Z1 is CR1 or N; Z2 is CR2 or N; Z3 is CR3 or N; Z4 is CR4 or N; and B is a pyrazolyl, imidazolyl, or triazolyl ring which compounds have anti-cancer activity, and more specifically, inhibit PI3 kinase activity.