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Access to Functionalized 2-Phenyl-4-(Indol-3-Yl)-4H-Chromenes via Coupling of 2-Hydroxychalcones and Indole in PEG-400 H2O under Catalyst-Free Conditions. J. Sci. Res. 2024, 16 (3), 857-872. https://doi.org/10.3329/jsr.v16i3.71425.