Synonyms: Nickel,[2,3-bis[[(2-hydroxyphenyl)methylene]amino]-2-butenedinitrilato(2-)-N2,N3,O2,O3]-,(SP-4-2)-;2-Butenedinitrile, 2,3-bis[[(2-hydroxyphenyl)methylene]amino]-,nickel complex;2,3'-Bis[[2-hydroxyphenyl)methylene]amino]-2-butenedinitrilato(2-)-N2,N3,O2,O3]nickel;C.I. Solvent Brown 53;Polysynthren Brown R;