The invention provided here creates a new paradigm for the treatment of a variety of conditions where modulation of a BAF complex is desired. The disclosure that follows outlines a strategy for modulating a BAF complex in a cell, and provides effective compounds, pharmaceutical compositions, development strategies, and treatment protocols, and describes many of the ensuing benefits. A new family of BAF complex modulating compounds has been developed based on a new chemical scaffold including a 12-membered macrolactam core structures. Contacting target cells in vitro or in vivo with the compounds and compositions of this invention can selectively inhibit the activity of BAF complexes in such cells. Some of the BAF complex modulating compounds in this family are particularly effective agents for treating cancer in conjunction with a ATR inhibitor.