COc1cc(/C=C/C(=O)OC[C@H](Br)[C@H](OC(C)=O)c2ccc3c(c2)OCO3)cc(OC)c1OC
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?