SYNOW fit to the spectra of SN 2006oz and SCP06F6. The observed spectra were brought to the rest-frame by assuming z = 0.376 and z = 1.189, respectively, and their fluxes were scaled to match in the overlapping wavelength region. Two SYNOW models, with and without C ii, are overplotted. The inset shows a zoom in the spectrum of SN 2006oz around 3300 Å. The magenta line (inset only) shows a model without Fe iii that provides a worse fit in this region. The lower panel shows the contribution of the individual ions to the model spectra. The best-fitting model has τ(O ii)  =  0.02, τ(Mg ii)  =  0.05, τ(Si iii)  =  0.5, τ(S iii)  =  0.5 and τ(Fe iii)  =  0.4.