Retraction: Novel biocompatible core/shell Fe3O4@NFC@Co(ii) as a new catalyst in a multicomponent reaction: an efficient and sustainable methodology and novel reusable material for one-pot synthesis of 4H-pyran and pyranopyrazole in aqueous media

Abstract

Retraction of ‘Novel biocompatible core/shell Fe₃O₄@NFC@Co(II) as a new catalyst in a multicomponent reaction: an efficient and sustainable methodology and novel reusable material for one-pot synthesis of 4H-pyran and pyranopyrazole in aqueous media’ by Pouya Ghamari Kargar et al., RSC Adv., 2020, 10, 37086–37097, https://doi.org/10.1039/D0RA04698A.