فهرس المقالات Benzyltriphenylphosphoniumtribromide حرية الوصول المقاله صفحة الملخص نص كامل 1 - 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