TAILIEUCHUNG - Terpenoids from the leaves and stems of dysoxylum tpongense

Cardiac arrests remain leading causes of deaths for thousands of people annually. One of the most common methods for cardiac arrest treatment is cardiopulmonary resuscitation (CPR) that provides chest compressions. It has been shown that the quality of chest compression is considered as one of key indicators for assessment of CPR performance. In this paper, we present an approach for CPR quality evaluation using ECG contaminated with CPR artifact and thoracic impedance. | Vietnam Journal of Science and Technology 57 2 2019 139-145 doi 2525-2518 57 2 12973 TERPENOIDS FROM THE LEAVES AND STEMS OF DYSOXYLUM TPONGENSE Pham Ngoc Khanh1 Bui Huu Tai2 Tran Thu Huong1 To Dao Cuong1 Ha Viet Hai1 Ngo Xuan Luong3 Young Ho Kim4 Nguyen Manh Cuong1 1Institute of Natural Products Chemistry Vietnam Academy of Science and Technology VAST 18 Hoang Quoc Viet Cau Giay Ha Noi Viet Nam 2Institute of Marine Biochemistry VAST 18 Hoang Quoc Viet Cau Giay Ha Noi Viet Nam 3Hong Duc University 565 Quang Trung Dong Ve Thanh Hoa Viet Nam 4College of Pharmacy Chungnam National University Daejeon Korea Email khanhngoclila@ nmciionginpc@ Received 17 August 2018 Accepted for publication 15 December 2018 Abstract. Study on chemical constituents from the leaves and stems of Dysoxylum tpongense Pierre resulted in the isolation of six known compounds 1-6 . The chemical structures of isolated compounds were identified as cabraleahydroxylactone 1 cabraleahydroxylactone-3-acetate 2 -spathulenol 3 -sitosterol 4 stigmasterol 5 and stigmast-4-en-3-one 6 by comparison of the physicochemical parameters the NMR and mass spectral data with those reported in the literature. Keywords Dysoxylum tpongense Pierre Meliaceae cabraleahydroxylactone phytosterol. Classification numbers 1. INTRODUCTION The genus Dysoxylum belonging to the family Meliaceae comprises about 75 species growing widely in South and South-eastern Asia such as Malaysia India Indonesia China New Zealand and Australia 1 . In Vietnam 14 species distributed throughout the country have been described 2 . Study of several species of this genus such as Dysoxylum kuskususense 3 D. richii D. hainanense D. acutangulum 4 D. cauliflorum 5 D. variabile 6 D. spectabile 7 etc led to the isolation and structural elucidation of different types of triterpenoids 5 8 diterpenoids 7 sesquiterpenoids 6 and limonoids 7 with many biological activities including osteoclast differentiation .

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