CC(C)C(=O)OCC1OC(n2c(Br)nc3c(=O)[nH]c(N)nc32)C(OC(=O)C(C)C)C1OC(=O)C(C)C
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?