CC(C)CCCC(C)[C@H]1CC[C@H]2[C@@H]3CC[C@H]4C[C@@H](CCC=C(c5cc(Cl)c(O)c(C(=O)OC(C)C)c5)c5cc(Cl)c(O)c(C(=O)OC(C)C)c5)CC[C@]4(C)[C@H]3CC[C@@]21C
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?