... JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page. Bioorganic & Medicinal Chemistry. Volume 10, Issue 5, May 2002, Pages 1619–1625. Cover image Cover image. ... 1 H NMR spectra were recorded on JEOL A-400 spectrometer using chloroform-d as solvent. Chemical shifts for 1 H NMR are given in parts per million (δ) relative to solvent signal (chloroform-d: δ H 7.24) as internal standards. ...