COc1ccc(OC2C=CC(c3ccccc3)OC2COC(=O)CCC(C)=NOC(C)c2cn(C(CO)Cc3ccccc3)nn2)cc1
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?