%0 Journal Article %T Calcined oyster shell nanoparticles (COS NPs): a new, efficient and reusable catalyst for one-pot rapid preparation of 1,8-dioxo-octahydroxanthenes under solvent-free conditions %A Mohammadian, Narges %A Akhlaghinia, Batool %J Research on Chemical Intermediates %@ 0922-6168 %D 2018