Phenolic Glucosides from Dendrobium aurantiacum var. denneanum and Their Bioactivities
作者:Liang Xiong、Zhi-Xing Cao、Cheng Peng、Xiao-Hong Li、Xiao-Fang Xie、Ting-Mo Zhang、Qin-Mei Zhou、Lian Yang、Li Guo
DOI:10.3390/molecules18066153
日期:——
A new 8,4¢-oxyneolignane glucoside 1 has been isolated from the stems of Dendrobium aurantiacum var. denneanum together with six known phenolic glucosides 2-7. The structure of the new compound, including its absolute configuration, was determined by spectroscopic and chemical methods as (–)-(7S,8R,7¢E)-4-hydroxy-3,3¢,5,5¢-tetramethoxy-8,4¢-oxyneolign-7¢-ene-7,9,9¢-triol 7,9¢-bis-O-β-D-glucopyranoside (1). In the in vitro assays, compound 1 and (-)-syringaresinol-4,4¢-bis-O-β-D-glucopyranoside (2) showed evident activity against glutamate-induced neurotoxicity in PC12 cells. Shashenoside I (4) showed a selective cytotoxic activity with the IC50 value of 4.17 μM against the acute myeloid leukemia cell line MV4-11, while it was inactive against 10 other human tumor cell lines.
从铁皮石斛(Dendrobium aurantiacum var. denneanum)的茎中分离出了一种新的 8,4'-氧基新木质素苷 1 以及六种已知的酚类苷 2-7。通过光谱和化学方法确定了新化合物的结构,包括其绝对构型,即 (-)-(7S,8R,7¢E)-4-hydroxy-3,3¢,5,5¢-tetramethoxy-8,4¢-oxyneolign-7¢-ene-7,9,9¢-triol 7,9¢-bis-O-β-D-glucopyranoside (1)。在体外试验中,化合物 1 和(-)-syringaresinol-4,4¢-bis-O-β-D-glucopyranoside(2)对 PC12 细胞中谷氨酸诱导的神经毒性表现出明显的活性。沙参苷 I(4)对急性髓性白血病细胞株 MV4-11 具有选择性细胞毒性活性,其 IC50 值为 4.17 μM,而对其他 10 种人类肿瘤细胞株没有活性。