COC(=O)c1cc(C(=O)OC)c(CC(=O)C(=O)NC2C3CC4CC(C3)CC2C4)nc1CC(=O)C(=O)NC1C2CC3CC(C2)CC1C3
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?