Vilailak PrachyawarakornChulabhorn MahidolSomsak RuchirawatChulabhorn Research InstituteMahidol UniversityThe Institute of Science and Technology for Research and Development, Mahidol University2018-08-202018-08-202006-05-01Phytochemistry. Vol.67, No.9 (2006), 924-928003194222-s2.0-33646044682https://repository.li.mahidol.ac.th/handle/20.500.14594/22900Four unusual pyranocoumarins (1-4) have been isolated from the dried twigs of M. siamensis. The structures were determined by spectroscopic data, especially 1D and 2D NMR experiments. © 2006 Elsevier Ltd. All rights reserved.Mahidol UniversityAgricultural and Biological SciencesBiochemistry, Genetics and Molecular BiologyChemistryPharmacology, Toxicology and PharmaceuticsArticleSCOPUS10.1016/j.phytochem.2006.02.006