COc1ccc(-c2[nH]c3c(c2-c2c(-n4cccc4)n(C)c(=O)[nH]c2=O)c(=O)[nH]c(=O)n3C)cc1F
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?