Three resveratrol’s oligomers from the stem bark of H. gregaria (dipterocarpaceae) and their toxicity and citotoxicity - ., Sahidin; Department of Chemistry, faculty of Mathematics and Natural Science Haluoleo University, Kendari, Southeast Sulawesi, Indonesia Natural Organic Chemistry Research Club, Chemistry Program Institut Teknologi Bandung (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2006)