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| Subject | English | Spanish |
| chem. | 2-methyl-2-propionic acid | ácido metacrílico |
| chem. | 2-methylene-propionic acid | ácido metacrílico |
| chem., engl. | 2-4-Chloro-2-methylphenoxy propionic acid | mecoprop |
| agric., chem. | 2-2,4-Dichlorophenoxylpropionic acid | diclorprop |