Erratum to: Res Chem Intermed (2012) 38:1291–1310 DOI 10.1007/s11164-011-0413-9

The Editor-in-Chief would like to alert readers that the accuracy of description in compounds (1) and (4) of this article has been questioned by readers. Unfortunately, we cannot confirm the correct descriptions by the authors. Consequently, readers are advised to check themselves the correct descriptions with caution.