CCCCCCn1c(=O)n2n(c1=O)C[C@@]1(O)CN(S(=O)(=O)c3ccc(C)cc3)C[C@@]1(OC(=O)NC1CCCC1)C2
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?