Formula (I) [Formula 1] Wherein, hydrogen, fluorine, chlorine, C 1-4 alkyl, C 1-4 alkoxy, C 3-6 cycloalkyl wherein R 1 - shows a 1-4 haloalkyl or C 1-4 alkyloxy C, R 2 represents a hydrogen, chlorine or fluorine, R 3 represents hydrogen or fluorine, R 4 is C 1-4 alkyl, C 3 or C 3-6 alkenyl can be a C 1-4 alkoxy or an optionally substituted hydrogen shows a -6 alkynyl, R 5 represents hydrogen, R 6 represents hydroxy, chlorine or fluorine, or R 5 and R 6, X and obtained, to form C = O with the carbon to which they are attached shows CH or N, provided, however the following cases: (i) R 1 represents a hydrogen, chlorine or fluorine, R 2 represents hydrogen, R 3 represents hydrogen, R 4 represents hydrogen, R 5 is When referring to hydroxy, (ii) R 1 represents a hydrogen, chlorine or fluorine, R 2 represents hydrogen, R 3 represents hydrogen, R 6, and R represents hydrogen and R 4 represents hydrogen When forming a C = O with the carbon to which they are attached, (iii) R 1 represents 1-4 alkyl C, R 2 represents hydrogen, R 3 represents hydrogen, R 6 and 5 R 4 represents hydrogen, R 5 represents hydrogen, when referring to CH, or (iv) R 1 represents 1-4 alkyl C, X represents hydrogen R 2 R 6, and indicates the hydroxy, R 3 represents hydrogen, R 4 represents hydrogen, X is a sulfonanilide class of] except when referring to CH R 6 and R 5, and forms a C = O with the carbon to which they are attached novel compounds herbicidal composition comprising, and are encompassed by formula (I).式(I)【化1】[式中、R1は水素、フッ素、塩素、C1-4アルキル、C1-4アルコキシ、C3-6シクロアルキル- C1-4アルキルオキシ若しくはC1-4ハロアルコキシを示し、R2は水素、フッ素若しくは塩素を示し、R3は水素若しくはフッ素を示し、R4は水素又は場合によりC1-4アルコキシ置換されていてもよいC1-4アルキル、C3-6アルケニル若しくはC3-6アルキニルを示し、R5は水素を示し、R6はヒドロキシ、フッ素若しくは塩素を示し、又はR5及びR6は、それらが結合している炭素と共にC=Oを形成し得、そしてXはCH若しくはNを示し、ただし以下の場合:(i) R1は水素、フッ素若しくは塩素を示し、R2は水素を示し、R3は水素を示し、R4は水素を示し、R5は水素を示し、そしてR6はヒドロキシを示す場合、(ii) R1は水素、フッ素若しくは塩素を示し、R2は水素を示し、R3は水素を示し、R4は水素を示し、そしてR5及びR6はそれらが結合している炭素と共にC=Oを形成する場合、(iii) R1はC1-4アルキルを示し、R2は水素を示し、R3は水素を示し、R4は水素を示し、R5は水素を示
