SEARCH Articles Figures Tables 2- Chlor-5-nitro- -ethylester 2- Nitro-3-phenyl- -ethylester 2-Amino-5-nitro- -ethylester 2-Ethyl-3-methyl-2- 3-nitro- -ethylester 2.3- Dimethyl-2- 3-nitro- -ethylester 3- - -ethylester 3- -2-nitro- -ethyleste 3- -2-nitro- -ethyleste 4- Benzyl-4-nitro- -ethylester 4-Methyl-4-nitro- -ethylester 4-Methyl-5- -4-nitro- -ethyleste