November 2009 issue
Cover illustration: The compound C31H49NO5 displays the rare zwitterionic oxime form in the solid state, in which a proton is transferred from the O atom to the N atom. See Hernández Linares, Sandoval Ramírez, Meza Reyes, Montiel Smith & Bernès [Acta Cryst. (2009). E65, o2954-o2955].