CC[C@H]1C=CCC[C@@]2(C[C@@H]3CC[C@@H]4[C@H](C(=O)OCCCCCCCCCCCCCCCC(=O)N(CCCN)C[C@@H](O)CCN)[C@]5(CCC[C@@H](C)O5)NC(=[N+]34)N2)O1.Cl.[Cl-]
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?