prov:value
| - A solid electrolyte cell according to claim 1, wherein R1 and R2 are a hydrogen atom, methyl, ethyl, phenyl, p-methylphenyl, p-methoxyphenyl p-chlorophenyl or p-fluorophenyl and R3, R4, R5 and R6 are a hydrogen atom, methyl, ethyl, methoxy, methylthio or fluorine or R3 and R4 and also R5 and R6 together are --CH2)4, --OCH2 O--, --OCH2 CH2 O-- or --CH???CH--CH???CH--. 5.
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