COc1cc(OC)c(OC)cc1/C=c1\[nH]c(=O)/c(=C/c2cc(OC)c(OC)cc2OC)[nH]c1=O
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?