Based on 1H and 13C NMR spectral analysis, the structures of kerriamycins A, B and C, new isotetracenone antibiotics, have been elucidated as shown in Fig. 1. Kerriamycin A contains a novel sugar, kerriose.
根据1 H和13 C NMR光谱分析,如图1所示,阐明了角叉霉素A,B和C(一种新的异四烯酮抗生素)的结构。角霉素A含有一种新型糖,即角藻糖。
The absolute configuration of P-1894B, a potent prolyl hydroxylase inhibitor.
作者:KAZUHIKO OHTA、EIJI MIZUTA、HISAYOSHI OKAZAKI、TOYOKAZU KISHI
DOI:10.1248/cpb.32.4350
日期:——
The previous X-ray-crystallographic determination of the relative configuration of P-1894B, a potent prolyl hydroxylase inhibitor isolated from the culture broth of Streptomyces albogriseolus, was extended by means of chemical and spectral studies. The absolute configuration of P-1894B (1) was established from the absolute configuration of two constituent monosaccharides, L-aculose (3) and L-rhodinose (4), produced by chemical degradation of 1. The absolute configuration of the aglycone part (aquayamycin) was also established as 2. The stereostructure of the reduction product (11) obtained by the catalytic hydrogenation of 1 was also elucidated.