There is provided a compound represented by the formula (I):wherein R1 is a C1-6 alkyl group or a (C1-6 alkyloxy)C1-6 alkyl group； R2 is a hydrogen atom or a C1-6 alkyl group； G is a hydrogen atom etc.； Z1 is a C1-6 alkyl group or a C1-6 alkyloxy group； Z2 is a C3-8 cycloalkyl group, etc.； Z3 is a C1-6 alkyl group, etc.； n is 0, 1, 2 or 3, which has an excellent weed controlling effect.
