1. Study
Program of Chemistry Education, University of Mataram, Jalan Majapahit
62, Mataram-Lombok 83125, Indonesia
2. Science
Education Program, Graduate School, Indonesia University of Education, Jalan Setiabudi 229, Bandung 40173, Indonesia
3. Organic
Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia