1-((4-((1,1-Dimethylpropyl)phenoxy)methyl)propyl) 2-propynyl sulfite 3489-84-7 C-912 ENT 27,225 Naugatuck C-912 Sulfurous acid, 1-((4-(1,1-dimethylpropyl)phenoxy)methyl)propyl 2-propynyl ester Sulfurous acid, 1-((p-tert-pentylphenoxy)methyl)propyl 2-propynyl ester U.S. Rubber C-912 Uniroyal C-912