SEARCH Articles Figures Tables 1- -2-methyl-4-nitro 2- - -methyleste 2- - -methylester 2- Methyl-4-nitro- -methylester 3- -2-nitro- -methyleste 3- Methyl-4- - -methylester 3-Nitro- -methylester 4 -Nitro-2-phenyl 4- Nitro-3-phenyl- -methylester 4-Methyl-4-nitro-5-phenyl-5- Methylesters