CC(=O)OC1C([N+]2(C)CCCCC2)C[C@H]2C3CC[C@H]4C[C@H](OC(C)=O)C([N+]5(C)CCCCC5)CC4(C)[C@@H]3CCC12C
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?