1. Faculty of Applied Sciences, Universiti Teknologi MARA Cawangan Negeri Sembilan, Kampus Kuala Pilah , Kuala Pilah 72000, Negeri Sembilan , Malaysia
2. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Islam Indonesia , Kampus Terpadu UII, Jl. Kaliurang Km 14 , Sleman, Yogyakarta 55584 , Indonesia
3. Kontra Pharma (M) SdnBhd(90082-V) Kontra Technology Centre (Block B) 1, 2 & 3, Industrial Estate , 75250, Jalan Ttc12 , Malacca , Malaysia