4a, 5a, 8a, 8b-tetrahydro-6H-pyrrolo[3',4':4, 5]furo[3,2-b] pyri-dine-6,8(7H)-dione derivatives for control of endoparasites processes for their preparation

摘要

The present invention relates to the use of 4a, 5a, 8a, 8b-tetrahydro-6H-pyrrolo[3',4':4,5]furo[3,2-b]pyridine-6,8(7H)-dione derivatives of the general formula (I) and salts thereof,in whichthe radicals R1 to R5 have the meaning given in the description, and to novel 4a, 5a, 8a, 8b-tetrahydro-6H-pyrrolo[3',4':4,5]furo[3,2-b]pyridine-6,8(7H)-dione derivatives and processes for their preparation.