C#C/C=C\CCCC/C=C\C#CC#CCCCC#CC#C[C@H](COS(=O)(=O)[O-])OS(=O)(=O)O.[Na+]
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?