Fig. 2

¹³C-NMR spectrum (a) and ¹H-NMR spectrum (b) of fraction B1-F1B in DMSO-d₆. c ¹³C-NMR data for the isolated fraction B1-F1B in DMSO-d₆. d Structure of the isolated fraction B1-F1B from E. bicyclis. The isolated fraction B1-F1B was identified as fucofuroeckol-b (FF) based on the NMR spectra results