CCOC1SC(SC)=NN1C(=O)C(OC(C)=O)C(OC(C)=O)C(OC(C)=O)C(OC(C)=O)C(=O)N1N=C(SC)SC1OCC
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?