Document Type : Research Article
Subjects
N. Tavakoli-Hoseini, M. M. Heravi, F. F. Bamoharram, A. Davoodnia and M. Ghassemzadeh, An unexpected tetracyclic product isolated during the synthesis of biscoumarins catalyzed by [MIM(CH2)4SO3H][HSO4]: Characterization and X-ray crystal structure of 7-(2-hydroxy-4-oxo-4H-chromen-3-yl)-6H,7H-chromeno[4,3-b]chromen-6-one. J. Mol. Liq., 163 (2011) 122-127