C#CC(O)/C=C/C(O)CCCC(O)CC#CC(O)C#CCCCCC(O)/C=C/CCCC(O)/C=C/CCCCCCCCCCCCCC(O)C(O)C#CC(=O)O
Molecules with a polar surface area of greater than 60 angstroms squared (Å2) is hard to pass brain blood barrier. What's the psa of this molecule?