CC1(C(=O)N2CC3(CC(c4cccc(NC(=O)CC(c5ccccc5)c5ccccc5)c4)=NO3)C[C@@H]2C(N)=O)CC1
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?