A compound, chelate, complex or salt thereof comprising a structure: ** Formula ** wherein each of R1 and R2 is independently selected from the group consisting of H and methyl; each of R7 and R8 is independently selected from the group consisting of H and methyl; each of R3, R4, R5 and R6 is independently selected from the group consisting of H and branched chain alkoxy C3-C6; and R9 is selected from the group consisting of H, C1-C5 linear alkyl, C3-C5 branched chain alkyl, C3-C5 cycloalkyl, C1-C5 linear alkoxy, C3-C5 branched chain alkoxy and C3-C5 cycloalkoxy , with the proviso that at least one of R3, R4, R5 and R6 is not H.
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机译：包含结构的化合物，螯合物，络合物或其盐：**式**，其中R 1和R 2各自独立地选自H和甲基; R 7和R 8各自独立地选自H和甲基。 R 3，R 4，R 5和R 6各自独立地选自H和支链烷氧基C 3 -C 6; R9选自H，C1-C5直链烷基，C3-C5支链烷基，C3-C5环烷基，C1-C5直链烷氧基，C3-C5支链烷氧基和C3-C5环烷氧基，但条件为R3，R4，R5和R6中的至少一个不是H。
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