COc1ccc(CC2C(=O)NC(C)C(=O)N(C)C3C(=O)N(C)C(Cc4ccc(O)c(c4)Oc4ccc(cc4)C3O)C(=O)NC(C)C(=O)NC(C)C(=O)N2C)cc1
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?