arries three identical or different aryl radicals according to the above definition. [0141] The expression ???aryl??? is to be understood as meaning a carbocyclic, i.e. constructed of carbon atoms, aromatic radical having preferably 6 to 14, in particular 6 to 12, carbon atoms, such as, for example, phenyl, naphthyl or biphenylyl, preferably phenyl. [0142] ???Aroyl??? accordingly denotes an aryl r