O=S(=O)(O)c1ccc2c(/N=N/c3ccc(/N=N/c4ccccc4)cc3)c(O)c(S(=O)(=O)O)cc2c1
Log D is a distribution coefficient widely used to measure the lipophilicity of ionizable compounds, where the partition is a function of the pH. What is the negative log D of this molecule?