CC12CC3OC(=O)C1COC14OC5(C2C1=O)C(O)(CCC1C4CC2OC24CC=CC(=O)C14C)C(=O)OC35C
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?