| http://www.w3.org/ns/prov#value | - The invention relates also to novel starting materials, for example of formulae IIa, IIb, IIIa and IIIb, which have been developed specifically for the preparation of the compounds according to the invention, to their use and to processes for their preparation, the variables having the meanings indicated for the groups of compounds of formula I that are preferred in each case.
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