G. Kalalawe, V.; R. Munde, D.; P. Kagne, R.; N. Niwadange, S.; D. Gutte, R. Green and Efficient Synthesis of Xanthene Derivatives Using 1-Butyl-3-Methylimidazolium Bromide under Solvent Free Condition. ajomc 2018, 3, 95-97.