Density functional theory (DFT) simulations were performed to study effect on structure, interaction and mechanical properties of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane/benzotrifuroxan (CL-20/BTF) under the hydrostatic pressure of 0-100 GPa. The calculated structure is...