US8716520B2 - Method of Resolution of (RS)- 1,1′-BI-2-Naphthol for Obtaining Enantiomeric Pure I.E. (s)-(−)-1,1′-BI-2-Naphthol and/or (r)-(+)-1,1′-BI-2-Naphthol via Co-Crystal Formation with Optically Active Derivatives of Γ-Amino Acids