COc1cc2c[n+](C)c3c4cc(OC)c(OCc5ccccc5)cc4c(OCc4ccccc4)cc3c2cc1OC.CS(=O)(=O)[O-]
A negative logP value indicates preferential solubility in water and a positive value indicates an affinity for octanol. What is the negative logP of this molecule?