COc1cc(/C=C2/C(=O)N(C(=O)OC(C)C)C(Cc3cc(OC)c(OC)c(C)c3OC)C(=O)N2Cc2ccccc2)c(OC)c(C)c1OC
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?