Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... 2-(2′-Hydroxy-5′-bromophenyl)-benzothiazoline exists as a ring-chain tautomeric mixture in CDCl 3 and DMSO-d 6 as proved by NMR spectroscopy. ... 2-(2′-Hydroxy-5′-bromophenyl )-benzothiazoline exists as a ring-chain tautomeric mixture in CDCl 3 and DMSO-d 6 as ...