CCCCCc1cc(=O)oc2c(C(CCN3CCN(c4ccccc4)CC3)c3ccc4c(c3)OCO4)c(OC)cc(OC)c12
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?