A compound according to formula I wherein; X 1 is selected from the group consisting of R 5 O, R 5 S n, R 5 CH 2, R 5 CH 2 O, R 5 CH 2 S n, R 5 OCH 2, R 5 S n CH 2 and NR 5 R 6; X 2 is selected from the group consisting of O, S, and NR 7; R 1 and R 2 are (i) each independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, C 1-6 haloalkoxy, C 1-6 haloalkylthio, halogen, amino, alkylamino, dialkylamino, aminoacyl, nitro and cyano; R 3 and R 4 are each independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkoxy, C 1-6 alkylthio, C 1-6 haloalkoxy, C 1-6 haloalkylthio, halogen, amino, alkylamino, dialkylamino, aminoacyl, and cyano; R 5 is selected from the group consisting of phenyl and naphthyl, pyridinyl, pyrimidinyl, pyrazinyl and pyrrolyl; wherein, said phenyl and said naphthyl, groups are optionally substituted with one to three substituents independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkoxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, C 1-6 haloalkoxy, C 1-6 haloalkylthio, halogen, amino, alkylamino, dialkylamino, aminoacyl, acyl, alkoxycarbonyl, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, nitro and cyano; R 6 is hydrogen, C 1-6 alkyl, or acyl; R 7 is hydrogen or C 1-6 alkyl optionally substituted with one or two substituents independently selected from the group consisting of hydroxy, alkoxy, thiol, alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, halogen, amino, alkylamino, aminoalkyl, alkylaminoalkyl, and dialkylaminoalkyl; n is an integer from 0 to 2; and acid addition salts thereof; wherein acyl when mentioned alone or in aminoacyl is a radical of formula C(=O)R wherein R is hydrogen, unbranched or branched alkyl containing 1 to 6 carbon atoms or a phenyl group. X 1 is selected from the group consisting of R 5 O, R 5 S n, R 5 CH 2, R 5 CH 2 O, R 5 CH 2 S n, R 5 OCH 2, R 5 S n CH 2 and NR 5 R 6; X 2 is selected from the group consisting of O, S, and NR 7; R 1 and R 2 are (i) each independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, C 1-6 haloalkoxy, C 1-6 haloalkylthio, halogen, amino, alkylamino, dialkylamino, aminoacyl, nitro and cyano; (i) each independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, C 1-6 haloalkoxy, C 1-6 haloalkylthio, halogen, amino, alkylamino, dialkylamino, aminoacyl, nitro and cyano; R 3 and R 4 are each independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkoxy, C 1-6 alkylthio, C 1-6 haloalkoxy, C 1-6 haloalkylthio, halogen, amino, alkylamino, dialkylamino, aminoacyl, and cyano; R 5 is selected from the group consisting of phenyl and naphthyl, pyridinyl, pyrimidinyl, pyrazinyl and pyrrolyl; wherein, said phenyl and said naphthyl, groups are optionally substituted with one to three substituents independently selected from the group consisting of hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkoxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, C 1-6 haloalkoxy, C 1-6 haloalkylthio, halogen, amino, alkylamino, dialkylamino, aminoacyl, acyl, alkoxycarbonyl, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, nitro and cyano; R 6 is hydrogen, C 1-6 alkyl, or acyl; R 7 is hydrogen or C 1-6 alkyl optionally substituted with one or two substituents independently selected from the group consisting of hydroxy, alkoxy, thiol, alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, halogen, amino, alkylamino, aminoalkyl, alkylaminoalkyl, and dialkylaminoalkyl; n is an integer from 0 to 2; and acid addition salts thereof; wherein acyl when mentioned alone or in aminoacyl is a radical of formula C(=O)R wherein R is hydrogen, unbranched or branched alkyl containing 1 to 6 carbon atoms or a phenyl group.