从蒙古图瓦省采集的薄蒴草（Leptopyrum fumarioides (L.) Reichenb.）地上部分中，分离出了两种新型罕见的苄基四氢异喹啉 N 氧化物 ——Leptomonines A 和 B。通过二维核磁共振（2D-NMR）和圆二色谱（CD）光谱分析，确定了它们的化学结构、绝对构型和构象。Leptomonine A（1）能够抑制脂多糖（LPS）刺激的 RAW 267.4 细胞中肿瘤坏 ...

(e) Although NMR energy transitions can be calculated, experimentally confirmed δ and J values are required for reliable structural correlation. (f) The increased dispersion and relative accessibility ...

Nanalysis Scientific Corp. ("the Company", TSXV: NSCI, OTCQX: NSCIF, FRA: 1N1), a leader in portable NMR instruments and ...

Nanalysis also says their electronics, software, and magnet platform will allow for the launching of other spectrometer ...

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科学技术的发展离不开科研仪器的进步。凯视迈（KathMatic）自2014年创建以来，一直“致力于高精尖光学测量技术”，已成为集“研发、制造、销售”为一体的国产高端光学精密测量仪器新力量。推出了KC系列多功能精密测量显微镜、KS系列超景深3D数码显微 ...

Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom ...