C/C=C(\C)c1cc(=O)c2c(C)cc3c(c2o1)C(=O)c1c(O)c(C2CC(C)(N(C)C)C(OC(C)=O)C(C)O2)cc(C2CC(N(C)C)C(O)C(C)O2)c1C3=O
The polar surface area (PSA) or topological polar surface area (TPSA) of a molecule is defined as the surface sum over all polar atoms or molecules, primarily oxygen and nitrogen, also including their attached hydrogen atoms. PSA is a commonly used medicinal chemistry metric for the optimization of a drug's ability to permeate cells. Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. How much is the polar surface area of this molecule?