Isoxazoline-substituted benzamide compound and pesticide

A substituted alkenylbenzene compound of formula (4): wherein X 1 is selected from the group consisting of halogen atom, —SF 5 , C 1 -C 6 halo alkyl, hydroxy C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy C 1 -C 6 haloalkyl, C 3 -C 8 halocycloalkyl, C 1 -C 6 haloalkoxy, C 1 -C 3 haloalkoxy C 1 -C 3 haloalkoxy, C 1 -C 6 haloalkylthio, C 1 -C 6 haloalkylsulfinyl and C 1 -C 6 haloalkylsulfonyl; X 3 is selected from the group consisting of a hydrogen atom, halogen atom, cyano, nitro, C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy and C 1 -C 6 alkylthio; X 4 is selected from the group consisting of a hydrogen atom, halogen atom, cyano, C 1 -C 4 alkyl, C 1 -C 4 alkoxy and C 1 -C 4 haloalkoxy; R 3 is —C(R 3a )(R 3b )R 3c , where R 3a and R 3b independently of each other are a halogen atom, or R 3a and R 3b together form 3- to 6-membered ring together with the carbon atom bonding them by forming a C 2 -C 5 haloalkylene chain, and R 3c is selected from the group consisting of a hydrogen atom, halogen atom, C 1 -C 5 alkyl, C 1 -C 5 haloalkyl, C 1 -C 4 haloalkoxy and C 1 -C 4 haloalkylthio, with a proviso that in case where X 1 is a fluorine atom, chlorine atom or trifluoromethyl, and both X 2 and X 3 are a hydrogen atom, in case where both X 1 and X 2 are fluorine atom and X 3 is a hydrogen atom, and in case where both X 1 and X 2 are trifluoromethyl and X 3 is a hydrogen atom, R 3c is a hydrogen atom, chlorine atom, bromine atom, iodine atom, C 1 -C 5 alkyl, C 1 -C 5 haloalkyl, C 1 -C 4 haloalkoxy or C 1 -C 4 haloalkylthio.