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Khaligh, Nader Ghaffari and Mihankhah, Taraneh and Johan, Mohd Rafie (2020) Catalytic application of 1,4-piperazinediethanesulfonic acid (PIPES) for the one-pot multicomponent synthesis of pyrano4,3-b]pyrans. Organic Preparations and Procedures International, 52 (4). pp. 368-373. ISSN 0030-4948, DOI https://doi.org/10.1080/00304948.2020.1761228.
Zonouzi, A. and Afjei, S.J. and Rahmani, A. and Ng, S.W. (2016) Novel Synthesis of Some 2-Aminochromene Derivatives using Nano-sized Zirconium Oxide as Catalyst. Organic Preparations and Procedures International, 48 (1). pp. 45-54. ISSN 0030-4948, DOI https://doi.org/10.1080/00304948.2016.1127099.