COc1ccc2c(c1)c1c(c(=O)n(Cc3ccccc3)c(=O)n1CC(=O)Nc1ccccc1F)n2C
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?