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Mohammed, H.H. 2017. Synthesis of fused cyclic chromene and alicyclic chromene derivatives from 2-amino-4-[4-(dimethylamino)phenyl]5-oxo-4H,5H-pyrano [3,2-c]chromene-3-carbonitrile. Al-Mustansiriyah Journal of Science. 27, 5 (Jul. 2017), 36–44. DOI:https://doi.org/10.23851/mjs.v27i5.165.