Sang-Un Choi

Phytochemical Constituents of Phyllanthus urinaria

Joon-Min Cha, Jong-Eel Park, Sang-Un Choi, Kang-Ro Lee

Extensive column chromatography separation of the MeOH extract from the aerial parts of Phyllanthus urinaria afforded seventeen compounds (1 - 17). The structures of the compounds were elucidated by physicochemical and spectroscopic methods to be 5′-β-D-glucopyranosyloxyjasmonic butyl ester (1), (+)-cucurbic acid (2), …

MLL-TET1 fusion protein promotes immortalization of myeloid progenitor cells and leukemia development

Hyeng-Soo Kim, Seung Hwan Oh, Ju-Heon Kim, Jae‐Young Kim et autres

this study was supported by grant SI1706 (Development of Radio-Modulators for Radio Accidents) by the Korea Research Institute of Chemical Technology (KRICT) and the National Research Foundation of Korea (grant NRF-2016R1C1B1010734) funded by the Ministry of Education, Science and Technology, Republic of …

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Three New Megastigmane Glycosides from Hylomecon vernalis

Seung Young Lee, Sang-Un Choi, Kang-Ro Lee

in mountainous regions of Korea, and China.1,2 H. vernalis has been used as Chinese folk medicine for the treatment of arthritis, neuralgia, and eczema.3 Previous phytochemical and pharmacological studies on this plant reported the isolation of several alkaloids and reported them to …

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New Cytotoxic δ-Valerolactones from Cornus walteri

Ki Hyun Kim, Young-June Shin, Sang-Un Choi, Kang-Ro Lee

Cornus walteri Wanger (Cornaceae) is a deciduous shrub distributed in valley areas of Asia.1 Its fruits and leaves have been used in Chinese folk medicine for treatment of inflammation of the skin or boils caused by lacquer poison,2 and Koreans have used …

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A New Glycoside of Resveratrol Dimer from Stem Bark of Vitis vinifera

Chun-Whan Choi, Yeonhee Choi, Mi‐Ran Cha, Dae-Seok Yoo et autres

Notes DOI 10.5012/bkcs.2010.31.11.3448 A New Glycoside of Resveratrol Dimer from Stem Bark of Vitis vinifera Chun Whan Choi,†,‡ Yeon Hee Choi,† Mi-Ran Cha,†,‡ Dae Seok Yoo,†,‡ Young Sup Kim,† Gyu hwan Yon,† Sang Un Choi,† Young Ho Kim,‡,* and Shi Yong Ryu†,* …

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Amoxantin A: A New Bisnorlabdane Diterpenoid from Amomum xanthioides

Ki Hyun Kim, Jung-Wook Choi, Sang-Un Choi, Eun Kyoung Seo et autres

C-3, 20 2αβ1.55 m1.55 m19.2 (t) C-4, 103αβ1.39 m1.21 ddd (12.5, 12.5, 5.0)42.3 (t) C-1, 5, 184 33.8 (s)5 1.11 dd (12.5, 2.5) 54.6 (d) C-3, 7, 9, 18, 19, 206αβ1.74 m1.46 m23.4 (t) C-4, 8, 107αβ2.45 m2.11 ddd (12.5, 12.5, 5.0) …

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Phytochemical Constituents from the Flowers of Gymnaster koraiensis and Their Cytotoxic Activities in vitro

Il-Kyun Lee, Ki Hyun Kim, Shi-Yong Ryu, Sang-Un Choi et autres

All melting points were determined on a Gallenkamp melting point apparatus and are uncorrected. Optical rotations were measured on a JASCO P-1020 Polari-meter. UV spectra were obtained using a Shimadzu UV-1601 UV/Visible spectrophotometer (Shimadzu Co.). NMR spectra were recorded on a Varian …

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Quinoline derivative KB3-1 potentiates paclitaxel induced cytotoxicity and cycle arrest via multidrug resistance reversal in MES-SA/DX5 cancer cells

Jin-Suk Koo, Won-Cheol Choi, Yun‐Hee Rhee, Hyo‐Jeong Lee et autres

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Trisindoline synthesis and anticancer activity

Miyoun Yoo, Sang-Un Choi, Ki Young Choi, Gyu Hwan Yon et autres

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Association of the ERK1/2 and p38 kinase pathways with nitric oxide-induced apoptosis and cell cycle arrest in colon cancer cells

H.-K. Jeon, Sang-Un Choi, N P Jung

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Cytotoxicity of two novel cisplatin analogues, (CPA)2Pt[DOLYM] and (DACH)Pt[DOLYM], to human cancer cellsin vitro

Sang-Un Choi, Kwang-Hee Kim, Eun-Jung Choi, Sung-Hee Park et autres

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