CC(C)(C)OC(=O)CC[C@H](NC(=O)C1CCN(C(=O)OC(C)(C)C)CC1)c1nnc([C@H](CCCCNC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C)o1
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?