COc1ccc(C2C(C(=O)c3ccc4c(c3)CC(C)O4)=C(O)C(=O)N2CCN2CCOCC2)cc1OC
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?