6-SUBSTITUTED 1,2,4A, 5A, 8A, 8B-HEXAHYDRO- AND 1,2,3,4,4A, 5A, 8A, 8B-OKTAHYDRO-6H-PYRROLO 3 ', 4': 4,5 FURO 3,2-B PYRID-8 (7H) -ON DERIVATIVES AND THEIR USE FOR COMBATING ENDOPARASITES

摘要

The present invention relates to 6-substituted 1,2,4a,5a,8a,8b-hexahydro- and 1,2,3,4,4a,5a,8a,8b-octahydro-6H-pyrrolo[3',4':4,5]furo[3,2-b]pyrid-8(7H)-one derivatives of the general formula (I) and their saltsin whichthe radicals R1, R2, R3, R4, B and A are each as defined in the description, to processes for their preparation and to their use for controlling endoparasites.