Synonyms: Pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene-25,26,27,28-tetrol,5,11,17,23-tetra-tert-butyl- (6CI,7CI);4-tert-Butylcalix[4]arene;4-tert-Butylcalix[4]arene-25,26,27,28-tetrol;5,11,17,23-Tetra-4-tert-butyl-25,26,27,28-tetrahydroxycalix[4]arene;5,11,17,23-Tetra-p-tert-butyl-25,26,27,28-tetrahydroxycalix(4)arene;5,11,17,23-Tetra-tert-butyl-25,26,27,28-tetrahydroxycalix[4]arene;5,11,17,23-Tetra-tert-butylcalix[4]arene;Formaldehyde-p-tert-butylphenylcyclic tetramer;NSC 344251;Tetra-p-tert-butyltetracalix[4]arene;Tetra-tert-butylcalix[4]arene;p-tert-Butylcalix[4]arene;p-tert-Butylcalix[4]arene-25,26,27,28-tetrol;p-tert-Butylcalix[4]arenetetrol;tert-Butylcalix[4]arene;