N-phenyl benzimidazolecarboxamide and N-phenyl indolecarboxamide derivatives

A compound of the formula:

• or a pharmaceutically acceptable non-toxic salt thereof wherein:
• Y is hydrogen or (C1-C6)alkyl;
• G represents halogen, trifluoromethyl, cyano, (C1-C6)alkyl, (C1-C6)alkoxy, hydroxy, hydroxy(C1-C6)alkyl, (C1-C6)alkyl or (C1-C6)alkyl, —SH, (C1-C6)alkylthio-, thio(C1-C6)alkyl or (C1-C6)alkyl thio(C1-C6)alkyl;
• R1 represents hydrogen, (C1-C6)alkyl or hydroxy(C1-C6)alkyl;
• R3 and R4 are the same or different and represent hydrogen, halogen, trifluoromethyl, trifluoromethoxy, [nitrile] cyano, (C1-C6)alkyl, (C1-C6)alkoxy, (C1-C6)alkoxy(C1-C6)alkoxy, hydroxy(C1-C6)alkoxy, hydroxy, hydroxy(C1-C6)alkyl, (C1-C6)alkoxy(C1-C6)alkyl, —SH, (C1-C6)alkylthio, thio(C1-C6)alkyl or (C1-C6)alkyl thio(C1-C6)alkyl, with the proviso that R3 and R4 cannot both be hydrogen simultaneously;
• and
• R5, R6, are the same or different and represent hydrogen, halogen, trifluoromethyl, trifluoromethoxy, cyano, (C1-C6)alkyl, (C1-C6)alkoxy, hydroxy, hydroxy(C1-C6)alkyl, or (C1-C6)alkoxy (C1-C6)alkyl.