Spectra from Synergistic effect of natural chickpea leaf exudates acids in heterocyclization: a greener protocol for benzopyran synthesis Snehali Mali Sachin Shinde Shashikant Damte Suresh Patil 10.6084/m9.figshare.5812983.v1 https://rs.figshare.com/articles/journal_contribution/Spectra_from_Synergistic_effect_of_natural_chickpea_leaf_exudates_acids_in_heterocyclization_a_greener_protocol_for_benzopyran_synthesis/5812983 FT-IR, 1H-NMR, 13C-NMR 2018-01-23 11:14:00 benzopyran Cicer arietinum chickpea exudates bio-catalyst natural catalyst