addenda and errata e12 Su È heyla O È zbey et al.  C 18 H 20 N 3 O + Cl  Acta Cryst. (2003). E59, e12 Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368 2-(Imidazol-1-yl)-1-(2-naphthyl)ethanone O-propyloxime hydrochloride. Erratum Su Èheyla O È zbey, a * Engin Kendi, a Arzu Karakurt b and Sevim Dalkara c a Department of Engineering Physics, Hacettepe University, Beytepe 06532, Ankara, Turkey, b Department of Pharmaceutical Chemistry, Hacettepe University, Sõhhiye 06100, Ankara, Turkey, and c Department of Pharmaceutical Chemistry, Ankara University, Sõhhiye 06100, Ankara, Turkey Correspondence e-mail: sozbey@hacettepe.edu.tr # 2003 International Union of Crystallography Printed in Great Britain ± all rights reserved In the paper by O È zbey et al. [Acta Cryst. (2002), E58, o1269± o1271], the Scheme and systematic name are incorrect. The correct Scheme is shown below and the correct systematic name is 1-[2-(2-naphthyl)-2-(propoxyimino)ethyl]imidazol-3- ium chloride.