Herbicidal trifluoromethyl phenoxy benzene sulphonamide derivs. - prepd. by reacting benzene sulphonyl halides with ammonia or amines
摘要
<p>Benzene-sulphonamide derivs. of formula (I) are new: (where X and Y are halogen; R1 and R2 are H or 1-6 C alkyl; R3 is H or halogen; R4 is H, halogen or 1-4 C alkyl).</p>
