CN(C)C1C(=O)C(C(N)=O)=C(O)C2(O)C(O)=C3C(=O)c4c(O)cccc4C(C)(O)C3CC12.CS(=O)(=O)O
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?