C=C(CCC12O[C@H](C(=O)O)[C@@](O)(C(=O)O)[C@](C(=O)O)(O1)[C@H](OC(=O)/C=C/[C@@H](C)C[C@@H](C)CC)[C@H]2O)[C@@H](OC(C)=O)[C@H](C)Cc1ccccc1
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?