COc1ccc(-c2csc(N(CCCN(C)C)C(=O)c3ccc(Br)cc3)n2)cc1.O=C(O)C(=O)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?