Structure of 2-Phenyl-2-(N,N-dimethyliminio)-dithioacetate, a Probable Intermediate of the Willgerodt-Kindler Reaction - Heinemann, Frank Wilhelm; Hartung, H; Hansen, J.; Maschmeier, C.-P.; Matschiner, H. (Acta Crystallographica Section C: Crystal Structure Communications, 1992)