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Sitepu, Amanda Revalona, Department of Chemistry, Faculty of Mathematics and Natural Sciences, State University of Medan (Indonesia)
Sitepu, Deri S, Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Medan 20221, Indonesia (Indonesia)
Sitinjak, Elvri Melliaty, Department of Chemical Engineering, Politeknik Teknologi Kimia Industri, Medan 20228, Indonesia (Indonesia)
Sitinjak, Elvri Melliaty, Department of Chemical Engineering, Politeknik Teknologi Kimia Industri, Medan (Indonesia)
Sitompul, Bramwell, Organic Chemistry Laboratory, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara (Indonesia)
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