130036-26-9 Acetic acid, 2,2',2'',2'''-((25,26,27,28-tetrakis(1,1-dimethylethyl)pentacyclo(19.3.1.1(3,7).1(9,13).1(15,19))octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene-5,11,17,23-tetrayl)tetrakis(oxy))tetrakis-, tetramethyl ester Calixarene