O=C1OC(c2ccc(O)c(-c3ccccc3)c2)(c2ccc(O)c(-c3ccccc3)c2)c2c(Cl)c(Cl)c(Cl)c(Cl)c21
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?