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Sari, Teti Purwita, Organic Chemistry Laboratory, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara (Indonesia)
Sarumaha, Gracella Evangeline, Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan (Indonesia)
Savitri, Astri Aulia, D III Pharmacy Study Program, Harapan Bersama Polytechnic, Tegal Indonesia Building A 3rd Floor
Campus 1 JL. Mataram No. 09 Tegal City, Postal Code 52122 (Indonesia)
Selly, Rini, Chemistry Depatment, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Jl. Willem iskandar Ps. V, Medan estate, Indonesia. (Indonesia)
Selly, Rini, Department of Chemistry, State University of Medan (Indonesia)
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