C1C2CC3CC1CC(Nc1nc(NC45CC6CC(CC(C6)C4)C5)nc(NC45CC6CC(CC(C6)C4)C5)n1)(C2)C3
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?