C=CCN(c1cc(OCc2ccccc2)c2c(c1)c(C)cn2S(=O)(=O)c1ccccc1)S(C)(=O)=O
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?