The present invention features solid compositions comprising Compound IA, IB, IC or ID, or a pharmaceutically acceptable salt thereof, in an amorphous form. In one embodiment, Compound IA, IB, IC or ID, or a pharmaceutically acceptable salt thereof, is formulated in an amorphous solid dispersion which comprises a pharmaceutically acceptable hydrophilic polymer and preferably a pharmaceutically acceptable surfactant.本發明是以包含呈非晶形式之化合物IA、IB、IC或ID或其醫藥學上可接受之鹽的固體組合物為特色。在一個實施例中,化合物IA、IB、IC或ID或其醫藥學上可接受之鹽係調配於包含醫藥學上可接受之親水性聚合物及較佳醫藥學上可接受之界面活性劑的非晶固體分散體中。