COc1ccc2[nH]c3c(C)c4ccnc(NCCCN(C)CCCNC(=O)NCCCN(C)CCCNc5nccc6c(C)c7[nH]c8ccc(OC)cc8c7c(C)c56)c4c(C)c3c2c1.O=C(O)C(F)(F)F
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?