CCC[C@@H](CN1CCC[C@H]1CN1C(N)=NC[C@@H]1Cc1ccccc1)N1C[C@@H]([C@H](C)CC)N(CCCC2CCCC2)C1=N
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?