A compound of Formula I, or salt thereof, wherein: MBG is tetrazolyl; R 1 is halo; R 2 is halo; R 3 is independently H, alkyl, nitro, cyano, haloalkyl, alkoxy, halo, haloalkoxy, alkenyl, haloalkenyl, cycloalkyl, halocycloalkyl, alkynyl, haloalkynyl, thioalkyl, SF 3, SF 6, SCN, SO 2 R 6, -C -alkyl, -C OH, -C O-alkyl, C H, CH=N-O-alkyl, -CH=N-O-arylalkyl; R 4 is aryl, heteroaryl or cycloalkyl optionally substituted with 0, 1, 2 or 3 independent R 3; R 5 is alkyl, haloalkyl, cycloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, aryl, heteroaryl, arylalkyl, or heteroarylalkyl, each optionally substituted with 0, 1, 2 or 3 independent R 3; R 6 is alkyl, aryl, substituted aryl, heteroaryl or substituted heteroaryl; R 7 is H; R 8 is independently alkyl or aryl; R 9 is H; and X is O or S; wherein "substituted" in reference to R6 refers to substituents selected from alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aralkyl, heteroaralkyl, aryl, heteroaryl, halogen, haloalkyl, cyano, nitro, alkoxy, aryloxy, hydroxyl, hydroxylalkyl, oxo, carboxyl, formyl, alkylcarbonyl, alkylcarbonylalkyl, alkoxycarbonyl, alkylcarbonyloxy, aryloxycarbonyl, heteroaryloxy, heteroaryloxycarbonyl, thio, mercapto, mercaptoalkyl, arylsulfonyl, amino, aminoalkyl, dialkylamino, alkylcarbonylamino, alkylaminocarbonyl, alkoxycarbonylamino, alkylamino, arylamino, diarylamino, alkylcarbonyl, or arylamino-substituted aryl; arylalkylamino, aralkylaminocarbonyl, amido, alkylaminosulfonyl, arylaminosulfonyl, dialkylaminosulfonyl, alkylsulfonylamino, arylsulfonylamino, imino, carbamido, carbamyl, thioureido, thiocyanato, sulfoamido, sulfonylalkyl, sulfonylaryl, mercaptoalkoxy, N-hydroxyamidinyl, or N'-aryl, N"-hydroxyamidinyl. MBG is tetrazolyl; R 1 is halo; R 2 is halo; R 3 is independently H, alkyl, nitro, cyano, haloalkyl, alkoxy, halo, haloalkoxy, alkenyl, haloalkenyl, cycloalkyl, halocycloalkyl, alkynyl, haloalkynyl, thioalkyl, SF 3, SF 6, SCN, SO 2 R 6, -C -alkyl, -C OH, -C O-alkyl, C H, CH=N-O-alkyl, -CH=N-O-arylalkyl; R 4 is aryl, heteroaryl or cycloalkyl optionally substituted with 0, 1, 2 or 3 independent R 3; R 5 is alkyl, haloalkyl, cycloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, aryl, heteroaryl, arylalkyl, or heteroarylalkyl, each optionally substituted with 0, 1, 2 or 3 independent R 3; R 6 is alkyl, aryl, substituted aryl, heteroaryl or substituted heteroaryl; R 7 is H; R 8 is independently alkyl or aryl; R 9 is H; and X is O or S; wherein "substituted" in reference to R6 refers to substituents selected from alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aralkyl, heteroaralkyl, aryl, heteroaryl, halogen, haloalkyl, cyano, nitro, alkoxy, aryloxy, hydroxyl, hydroxylalkyl, oxo, carboxyl, formyl, alkylcarbonyl, alkylcarbonylalkyl, alkoxycarbonyl, alkylcarbonyloxy, aryloxycarbonyl, heteroaryloxy, heteroaryloxycarbonyl, thio, mercapto, mercaptoalkyl, arylsulfonyl, amino, aminoalkyl, dialkylamino, alkylcarbonylamino, alkylaminocarbonyl, alkoxycarbonylamino, alkylamino, arylamino, diarylamino, alkylcarbonyl, or arylamino-substituted aryl; arylalkylamino, aralkylaminocarbonyl, amido, alkylaminosulfonyl, arylaminosulfonyl, dialkylaminosulfonyl, alkylsulfonylamino, arylsulfonylamino, imino, carbamido, carbamyl, thioureido, thiocyanato, sulfoamido, sulfonylalkyl, sulfonylaryl, mercaptoalkoxy, N-hydroxyamidinyl, or N'-aryl, N"-hydroxyamidinyl.