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Oktavianis, Tiska (Indonesia)
Ompusunggu, Erpida, Natural Science Study Program, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Jl. Willem iskandar Ps. V, Medan estate, Indonesia. (Indonesia)
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Pane, Yulia Ratu, Organic Chemistry Laboratory, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan 20155,
Indonesia (Indonesia)
Panjaitan, Angel Shylvia, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Medan State University, Medan 20221, Indonesia (Indonesia)
Panjaitan, Jesica C.R., Chemistry Department, Faculty of Mathematics and Sciences, Universitas Negeri Medan (Indonesia)
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