title: 6,6'-Di-tert-butyl-4,4'-dimethyl-2,2'-[1,2-phenyl-enebis(nitrilo-methanylyl-idene)]diphenol.
abstract: In the title mol-ecule, C(30)H(36)N(2)O(2), the dihedral angles between the central benzene ring and the two benzene rings of the butyl-salicylaldimine groups are 14.3 (2) and 40.6 (2)°. There are two strong intra-molecular O-H⋯N hydrogen bonds which form S(6) rings. The crystal studied was a non-merohedral twin with refined components of 0.270 (4) and 0.730 (4).
authors.affiliation: Department of Pharmacy, Jining Medical College, Xueyuan Road 669, Rizhao,  People's Republic of China.
authors.forename: Rui-Fang
authors.initials: RF
authors.lastname: Ding
authors.forename: Qi-Bao
authors.initials: QB
authors.lastname: Wang
authors.forename: Xin-Min
authors.initials: XM
authors.lastname: Wen