COc1ccc2[nH]c3c(c2c1)CCN1C(=O)C(CC(=O)NCCCn2ccnc2)C[C@H](C(=O)N2CCCCC2)[C@@]31C
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?