COC(=O)CCC(=O)OC1(C)C(=O)C2=CN(CCCOC(C)C)C(c3ccc(OC)cc3)=CC2=C(Br)C1=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?