Anthelmintic compounds

An anthelmintic compound of formula (IA-1):

• wherein:
• Y is naphthyl, benzofuranyl, dihydrobenzofuranyl, quinolinyl, isoquinolinyl, tetrahydroquinolyl, tetrahydroisoquinolyl, indolyl, isoindolyl, benzothiophenyl, benzimidazolyl, benzoxazolyl or benzothiazolyl, which is optionally substituted by one or more of chloro, fluoro, bromo, CF3, OCF3, SCF3 or SF5;
• Z is phenyl optionally substituted by one or more halogen, cyano, nitro, CF3, SF5, S(O)C1-3-alkyl, S(O)2—C1-3-alkyl, S(O)C1-3-haloalkyl or S(O)2C1-3-haloalkyl;
• X1 is a bond, —C(O)—, —(CH2)— where n is 1 to 3 or —NH—, wherein each CH2 in —(CH2)n and —NH— is optionally independently substituted with one or two substituents selected from the group consisting of halogen, C1-3alkyl, C1-3haloalkyl, hydroxy-C1-3alkyl, C1-3alkoxy-C1-3alkyl, amino-C1-3alkyl, C1-3alkylamino-C1-3alkyl, C1-3dialkylamino-C1-3alkyl, C1-3alkoxycarbonyl, C1-3alkylcarbonyl and C2-4alkenylcarbonyl, each of which may be further independently substituted by hydroxy, hydroxy-C1-3alkyl, amino, C1-3alkylamino, C1-3dialkylamino or —COOH;
• Ring A is L1, L2, L3, L13, L14, L15, L16, L17 or L18 wherein Q5 and Q6 are nitrogen;
• R5, R6, R7 and R8 are independently hydrogen, C1-3alkyl or C1-3haloalkyl:
• Ring B is L4 wherein Q1 is carbon and Q2 is nitrogen:
• W is O;
• X6 is a bond, —O—, —(CH2)— where n is 1 to 3 or —NH—;
• X8 is a bond, —(CH2)n— where n is 1 to 3, —O— or —NH—, wherein each CH2 in —(CH2)n— and —NH— is optionally independently substituted with one or two substituents selected from the group consisting of halogen, C1-3alkyl, C1-3haloalkyl, hydroxy-C1-3alkyl, C1-3alkoxy-C1-3alkyl, amino-C1-3alkyl, C1-3alkylamino-C1-3alkyl, C1-3dialkylamino-C1-3alkyl, C1-3alkoxycarbonyl, C1-3alkylcarbonyl and C2-4alkenylcarbonyl, each of which may be further independently substituted by hydroxy, hydroxy-C1-3alkyl, amino, C1-3alkylamino, C1-3dialkylamino or —COOH;
• R2 and R3 are H;
• n is 1 or 2;
• and
• m and q are 0.