abstract |
A compound of the formula: <IMAGE> wherein R1 and R2, which may be the same or different, are each a C1-C3 alkyl group, a chloromethyl group or a halogen atom, R3 is a hydrogen atom, a methyl group or a halogen atom, n is an integer of 2 to 5 and X is a hydrogen atom, a methyl group, a methoxy group or a chlorine atom, which is useful as a herbicide. |