COc1cc2c(cc1OCCN1CCN(CCOc3cc4c(cc3OC)C(=O)N3CCC[C@H]3C=N4)CC1)N=C[C@@H]1CCCN1C2=O
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?