CC1(C)CC(=O)c2c(nc3c(ccc4ccccc43)c2-c2ccc(NC(=O)CCC(=O)Nc3ccc(-c4c5c(nc6c4ccc4ccccc46)CC(C)(C)CC5=O)cc3)cc2)C1
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?