Affiliation: | 1. Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, 10330, Bangkok, Thailand 2. Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, 10330, Bangkok, Thailand 3. Walai Rukhavej Botanical Research Institute, Mahasarakham University, 44000, Mahasarakham, Thailand 4. Natural Products Research Section, National Cancer Institute, 10440, Bangkok, Thailand
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