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Metcamifen is a herbicide safener that can protect rice from Clodinafop-propargyl (HY-136380)[1].

ChEBI:Metcamifen is an N-sulfonylcarboxamide resulting from the formal condensation of the sulfamoyl group of 4-[(methylcarbamoyl)amino]benzene-1-sulfonamide with the carboxy group of 2-methoxybenzoic acid. It is a herbicide safener applied as a seed treatment in sorghum. It has a role as a herbicide safener. It is a monomethoxybenzene, a N-sulfonylcarboxamide, a sulfonamide, a member of ureas and a member of benzamides.

[1] Brazier-Hicks M, et al. Chemically induced herbicide tolerance in rice by the safener metcamifen is associated with a phased stress response. J Exp Bot. 2020 Jan 1;71(1):411-421. DOI:10.1093/jxb/erz438