CC(C)(C)n1c(=O)n2n(c1=O)C1c3cccc4cccc(c34)C2C2c3cccc4cccc(c34)C1n1c(=O)n(C(C)(C)C)c(=O)n12
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?