Spectroscopy Letters, cilt.25, sa.4, ss.559-564, 1992 (SCI-Expanded)
13C NMR spectra of lumisantonin (2), isosantoxane (3a), its acetyl derivative (3b) and santonic acid (4) are reported. The structure of a novel photo derivative (6) is established on 13 the basis of spectroscopic methods, particularly 13C NMR spectra. © 1992, Taylor & Francis Group, LLC. All rights reserved.