CC(C)NC(=O)OCc1c(COC(=O)NC(C)C)c(-c2cc[n+](COC(=O)C3CC3)cc2)n2c1CCC2.[I-]
Molecules with a polar surface area of greater than 60 angstroms squared (Å2) is hard to pass brain blood barrier. What's the psa of this molecule?