CC[C@@H](C)[C@@H]1CN([C@@H](C)CN2CCC[C@H]2CN2C(N)=NC[C@H]2C(C)C)C(=N)N1CCc1ccc(Cl)c(Cl)c1
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?