CC(=O)c1c(O)c(C)c(O)c2c1OC1=Cc3c(c(C)nn3-c3ccccc3)C(=O)C12C
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?