CC(=O)OC1COC(N2C(=O)/C(=N\NC(N)=S)c3cc(Br)ccc32)C(OC(C)=O)C1OC(C)=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?