149495-20-5 | tetraethyl 2,2',2'',2'''-((15,35,55,75-tetraisopropyl-14,36,56,76-tetramethyl-1,3,5,7(1,3)-tetrabenzenacyclooctaphane-12,32,52,72-tetrayl)tetrakis(oxy))tetraacetate | AOBChem