Characterization and Nonenzymatic Transformation of Three Types of Alkaloids from <i>Streptomyces albogriseolus</i> MGR072 and Discovery of Inhibitors of Indoleamine 2,3-Dioxygenase
作者:Du Gao、Ting Zhou、Lin-Tai Da、Torsten Bruhn、Li-Li Guo、Yu-Hang Chen、Jun Xu、Min-Juan Xu
DOI:10.1021/acs.orglett.9b03149
日期:2019.11.1
The known benzonaphthyridine alkaloid, albogrisin A (1), and six new compounds, including two pyrazinone stereoisomers, albogrisin B (2)/B′ (2′), together with four 4H-pyrroloquinolinones, two diastereoisomers, albogrisin C (3)/C′ (3′), and their methyl esters, albogrisin D (4)/D′ (4′), were isolated from mangrove-derived Streptomyces albogriseolus MGR072. 2 and 2′ are converted into 1 in acidic aqueous
已知的苯并萘啶生物碱,阿布格辛A(1)和六个新化合物,包括两种吡嗪酮立体异构体,阿布格辛B(2)/ B'(2'),以及四个4 H-吡咯并喹啉酮,两个非对映异构体,阿布格辛C(3) / C'(3')及其甲酯,即酯蛋白D(4)/ D'(4'),是从红树林衍生的链霉菌(Streptomyces albogriseolus) MGR072中分离得到的。2和2'被转换成1在酸性水溶液中,但为3 / 3'和4 / 4'在0.05%三氟乙酸乙腈中。4和4'是新的吲哚胺2,3-二加氧酶1抑制剂。