| abstract |
PCT No. PCT/EP91/02268 Sec. 371 Date Jun. 7, 1993 Sec. 102(e) Date Jun. 7, 1993 PCT Filed Nov. 29, 1991 PCT Pub. No. WO92/10489 PCT Pub. Date Jun. 25, 1992.2-Amino-4-oxo-4H-benzopyrans I <IMAGE> I (m=0, 1 or 2; R1-R4 have the meanings stated in the description) and the salts of I, and herbicides which contain 2-(4-hetaryloxy)- and 2-(4-aryloxy)-phenoxyacetic acid derivatives and/or cyclohexenone derivatives as herbicidal active ingredients and 2-amino-4-oxo-4H-benzopyrans I' as antidotes. |