| abstract |
A pyridine compound represented by formula (I) :( see formula I), or its salts, where R1 is hydrogen or optionally substituted alkyl; R2 is optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted cyloclalkyl, or the like, R3 is optionally substituted alkyl, or the like, R4 is hydrogen, alkyl, haloalkyl, halogen, -OR8 or -SR8, R5, R6 and R7 are each hydrogen, halogen, or alkyl; R8 is optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl or optionally substituted cycloalkyl; and X represents CO, CS, or SO2, or a salt thereof. |