O=S(=O)(c1ccccc1)[C@@H]1[C@H]2C=C[C@](CS)(O2)[C@H]1S(=O)(=O)c1ccccc1
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?