O=C1N/C(=N\C2CCCCC2)C2(CCN(CCCC3(c4ccc(F)cc4)OCCO3)CC2)N1c1ccccc1
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?