C/C(CCN1CCc2nc(-c3ccccc3)c(-c3ccccc3)cc2C1)=N\O[C@@H](C)CN1CCCCc2nc(C)c(C)cc21
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?