C#C[C@]1(O)CC[C@H]2[C@@H]3CCC4=C/C(=N/OC(=O)c5cccc6c(=O)c7ccccc7[nH]c56)CCC4[C@H]3CC[C@@]21CC
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?