CCOC(=O)C1=C(N)n2c(s/c(=C/c3ccco3)c2=O)=C(C(=O)OC)C1c1ccco1
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?