1. Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya, East Java 60115, Indonesia
2. Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Surabaya, East Java 60115, Indonesia
3. Plant Biomass Utilization Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand