@article{CTT100575121,
  author = {J. Nishida and Y. Fujiwara and Y. Yamashita},
  title = {Synthesis, Crystal Structure, and Physical Properties of 7,14-Disubstituted Pentacene-5,12-diones Containing a Methylenequinoid Structure},
  journal = {Org. Lett},
  year = 2009,
}