1. Ramadhan, R., Phuwapraisirisan, P., Kusuma, IW., Amirta, R. 2020. Ethnopharmacological information of selected East Kalimantan flora for diabetes therapy: The isolation of lupane triterpenoids as α-glucosidase inhibitors from Ceriops tagal (PERR) C.B. ROBB. Rasayan Journal of Chemistry 13, 1727-1734.
  2. Khongkarat, P., Ramadhan, R., Phuwapraisirisan, P., Chanchao, C. 2020. Safflospermidines from the bee pollen of Helianthus annuus exhibit a higher in vitro antityrosinase activity than kojic acid. Heliyon 6, 1-10.
  3. , Ramadhan, R., Kusuma, I.W., Egra, S., Shimizu, K., Kanzaki, M., Arung, E.T. 2020. Diversity and honey properties of stingless bees from meliponiculture in East and North Kalimantan, Indonesia. Biodiversitas 20, 4623-4630.
  4. Aung, E.E.Kristanti, A.N.Aminah, N.S.Takaya, Y.Ramadhan, R. Cytotoxicity of butyrospermol and sitosterone from the bark of Syzygium aqueum. Tropical Journal of Natural Product Research 4, 899-904.
  5. Thant, T.M., Aminah, N.S., Kristanti, A.N., Ramadhan, R., Hasna, I.H., Aung, H.T., Takaya, Y. 2020. Coumarins and carbazole alkaloid from Clausena excavate roots and investigation of their α-glucosidase inhibitory activity. Tropical Journal of Natural Product Research 4, 334-337.
  6. Aung, E.E., Kristanti, A.N., Aminah, N.S., Takaya, Y., Ramadhan, R. 2020. Plant description, phytochemical constituents and bioactivities of Syzygium genus: A Review. Open Chemistry 18, 1256-1281.
  7. Tun, K.N.W.Aminah, N.S.Kristanti, A.N.Ramadhan, R.,Takaya, Y. 2020. Cytotoxic prenyl and geranyl coumarins from the stem bark of Casmiroa edulis. Letters of Organic Chemistry 17, 680-687.
  8. Thant, T.M., Aminah, N.S., Kristanti, A.l., Ramadhan, R., Aung, H.T., Takaya, Y. 2020. Phytoconstituens of genus Microleum and their bioactivity-a review. Natural Product Communications 15, 1-15.
  9. Ramadhan, R., Kristanti A N., Amirta R., Kusuma I W., Phuwapraisirisan, P., Haqiqi M T., Saparwadi., 2019. Screening for potential antidiabetes and antioxidant activities of selected plants from East Kalimantan, Indonesia. Biodiversitas 20, 1820 – 1826.
  10. Tun, K.N.W., Aminah, N.S., Kristanti, A.N., Ramadhan, R., Takaya, Y. 2019. Two Flavonoids from Stem Bark of Casimiroa edulis and Their Antidiabetic and Antioxidant Activities. IOP Conference Series: Earth and Environmental Science 217, 012006.
  11. Ramadhan, R., Worawalai, W and Phuwapraisirisan, P. 2019. New onoceranoid xyloside from Lansium Parasiticum. Natural Products Research 33, 2917-2924.
  12. Potipiranun, T., Adisakwattana, S., Worawalai, W., Ramadhan, R., Phuwapraisirisan, P. 2018. Identification of Pinocembrin as an Anti-Glycation Agent and α-Glucosidase Inhibitor from Fingerroot (Boesenbergia rotunda): The tentative structure–activity relationship towards Mg-trapping activity. Molecules 23, 3365.
  13. Ramadhan, R., Wijaya, K.I., Amirta, R., Worawalai, W and Phuwapraisirisan, P. 2018. A new 4-arylflavan from the pericarps of Horsfieldia motleyi displaying dual inhibition against α-glucosidase and free radicals. Natural Products Research 32, 2676-2682.
  14. Ramadhan, R and Phuwapraisirisan, P. 2015. New arylalkanones from Horsfieldia macrobotrys, effective antidiabetic agent concomitantly inhibiting α-glucosidase and free radicals. Bioorganic & Medicinal Chemistry Letters 25, 4529-4533.
  15. Ramadhan, R and Phuwapraisirisan, P. 2015. Arylalkanones from Horsfieldia macrobotrys are effective antidiabetic agents achieved by α-glucosidase inhibition and radical scavenging. Natural Product Communications 10, 325-328.
  16. Kusuma, I W., Arung E T., Ramadhan R., Aryani, F., Kim YU. 2015. Anti-hyperuricemia natural products from medicinal plants used by local tribes in Indonesia. Planta Medica 81 – SL5B_05 DOI: 10.1055/s-0035-1565351.