CC(C)NC(=O)OCc1c(COC(=O)NC(C)C)c(-c2cc[n+](COC(=O)CC(C)(C)C)cc2)n2c1CCC2.[I-]
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?