COPPER, BIS[.MU.-[4-(HYDROXY-.KAPPA.O)-3-[[[(1R)-2-(HYDROXY-.KAPPA.O:.KAPPA.O)-2,2-BIS(2-METHOXYPHENYL)-1-METHYLETHYL]IMINO-.KAPPA.N]METHYL]BENZONITRILATO(2-)]]DI-, STEREOISOMER
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