April 2007 issue
Cover illustration: Surprisingly, this simple compound, 3-methylenecyclohexane-1,1-dicarboxylic acid is the first example of a 1,1-cyclohexanedicarboxylic acid for which atomic coordinates are available. The Cambridge Structural Database contains one entry, a conference abstract from 1986, which was never published in full. See Foces-Foces, Rodríguez & Pérez-Hernández [Acta Cryst. (2007), E63, o1308-o1310].