The present invention relates to nucleic acid sequences for regulating gene expression in plants. The etching resist of the present invention can be suitably used, for example, in the production of a molded article for surface-working an optical member such as a microlens sheet, a light diffusing sheet, a non-reflective sheet, a sheet for encapsulating photosemiconductor elements, an optical waveguide, an optical disk, or a photosensor. R2 and R3 are hydrocarbons having 0 to 10 carbons including a straight or a branched structure.