CC[C@H](C)C1=C(O)[N@+]2([O-])Oc3ccc(-c4c(O)c(O)c(-c5ccc(OC(C)=O)cc5)c(OC(C)=O)c4OC(C)=O)cc3O[C@]2([C@@H](C)CC)C(=O)N1O
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?