O=C(/C=C1\N=C(c2ccccc2)N(c2ccc3c(c2)Sc2cc(N4C(=O)/C(=C/C(=O)/C=C/c5ccccc5)N=C4c4ccccc4)ccc2N3)C1=O)/C=C/c1ccccc1
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?