2,2'-(Cyclohexane-1,2-diylbis(nitrilomethylidyne))bisphenol 64346-55-0 EINECS 264-805-0 N,N'-Disalicylidene-1,2-cyclohexanediamine Phenol, 2,2'-(1,2-cyclohexanediylbis(nitrilomethylidyne))bis-