The crystal structure of (4<i>Z</i>)-2-[(<i>E</i>)-(1-ethyl-3,3-dimethyl-1,3-dihydro-2<i>H</i>-indol-2-ylidene)methyl]-4-[(1-ethyl-3,3-dimethyl-3<i>H</i>-indolium-2-yl)methylidene]-3-oxocyclobut-1-en-1-olate, C<sub>30</sub>H<sub>32</sub>N<sub>2</sub>O<sub>2</sub>
Zeitschrift für Kristallographie. New crystal structures/Zeitschrift für Kristallographie. New crystal structures