cyclobutatetraene;CYCLOBUTANE;7236-82-0;287-23-0;CYCLOBUTANE;Cyclobutane [UN2601]  [Flammable gas];EINECS 206-014-5;HSDB 58;Tetramethylene;UN2601;CHEBI:30377;InChI=1/C4H8/c1-2-4-3-1/h1-4H
cyclobutatetraene;CYCLOBUTANE