Introduction of two efficient catalysts for the synthesis of 1,8-dioxo-octahydroxanthene derivatives in the absence of solvent Farhad Shirini, Gholam Hossein Imanzadeh, Masoumeh Abedini, Maryam Akberi Dokhte-Ghaziani, Mohaddeshes Safarpoor Langroodi, Parisa Ghods Ghasemabadi, Requires Subscription PDF Requires Subscription HTML downloads: 149 views: 11