| abstract |
A compound according to formula I ** Formula ** in which: X is S; R1 is H; R2 is Z and Z is phenyl, optionally substituted at the meta or para position, or at both positions, with one or two substituents selected from the list consisting of -NO2, halogen, CF3, (1C-4C) alkyl and methoxy; or Z is thien-2-yl, optionally substituted at the 3, 4 or 5 position with halogen; or Z is N-methylpyrol-3-yl or benzo [b] thien-2-yl or 2-naphthalenyl; R3, R4 are H, H or H, CH3 or CH3, CH3; R5 is H; R6 is halogen or methoxy; or a pharmaceutically acceptable acid addition salt thereof. |