Crystal structures of bis(dimethylformamide)tetrakis(ibuprofenato)dicopper( II) dimethylformamide solvate (1:2), Cu2(C3H7NO)2(C13H17O2)4 · 2C3H7NO, and bis(dimethylsulfoxide)tetrakis(ibuprofenato)dicopper(II) dichloromethane solvate (1:2), Cu2(C2H6SO)2(C13H17O2)4 · 2CH2Cl2