prov:value
| - those compounds of the formula I being excluded in which Y is S or SO and, at the same time, X is CH, t is the number 0, u is the number 0, R4 is hydrogen or 1-4C-alkyl and R6 is an R8- and R9-substituted cyclic system or bicyclic system which is selected from the group consisting of benzene, furan, thiophene, pyrrole, oxazole, isoxazole, thiazole, thiazoline, isothiazole, imidazole, imidazoline,
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