The present invention relates to a compound of formula I wherein G1 is oxygen； R1 is hydrogen； R2 is a group P, L is a bond, methylene or ethylene； R3 is hydrogen； R4 is independently Hydrogen, cyano, cyano-C 1 -C 8 alkyl, C 1 -C 8 alkyl, C 1 -C 8 haloalkyl, C 3 -C 8 cycloalkyl, C 3 -C 8 cycloalkyl (wherein one carbon atom is O, S, Substituted with S (O) or SO2), or C3-C8 cycloalkyl-C1-C8 alkyl, C3-C8 cycloalkyl-C1-C8 alkyl, wherein one carbon atom in the cycloalkyl group is Substituted with O, S, S (O) or SO2), or C3-C8 cycloalkyl-C1-C8 haloalkyl, C1-C8 hydroxyalkyl, C1-C8 alkoxy-C1-C8 alkyl, C2-C8 alkenyl, C2 ~ C8 haloal Nyl, C2-C8 alkynyl, C2-C8 haloalkynyl, phenyl, phenyl substituted with 1 to 3 R6, phenyl-C1-C4 alkyl, phenyl-C1-C4 alkyl (where the phenyl moiety is 1-3 5-6 membered heteroaryl-C 1 -C 4 alkyl or 5-6 membered heteroaryl-C 1 -C 4 alkyl (wherein the heteroaryl moiety is substituted with 1 to 3 R 6) Or C 1 -C 4 alkyl- (C 1 -C 4 alkyl-O—N═) C—CH 2 —； each R 6 is independently halogen, cyano, nitro, C 1 -C 8 alkyl, C 1 -C 8 haloalkyl, C 1 -C8 alkoxy, or C1-C8 haloalkoxy； Y1, Y2 and Y3 are independently CH or nitrogen； wherein no more than two of Y1, Y2 and Y3 are nitrogen； And Y3 are not both nitrogen； R5 is hydrogen, halogen, cyano, nitro, NH2, C1-C2 alkyl, C1-C2 haloalkyl, C3-C5 cycloalkyl, C1-C2 halocycloalkyl, C1 -C2 alkoxy, C1-C2 haloalkoxy； or Y1 is CR7 and R5 and R7 together form a -CH = CH-CH = CH- bridge or a -N = CH-CH = CH- bridge. X2 is C-X6 or nitrogen； X1, X3 and X6 are independently hydrogen, halogen or trihalomethyl, wherein at least two of X1, X3 and X6 are not hydrogen； Or a salt or N-oxide thereof, wherein X4 is trifluoromethyl, difluoromethyl or chlorodifluoromethyl. The present invention also provides intermediates useful in the preparation of compounds of formula I, as well as methods for controlling insects, ticks, nematodes or mollusks using compounds of formula I.本発明は、式Ｉ（式中、Ｇ1が酸素であり；Ｒ1が水素であり；Ｒ2が基Ｐであり、Ｌが、結合、メチレンまたはエチレンであり；Ｒ3が水素であ
