Keywords: Trans-2-pentene.svg trans-2-pentene chemical structure made using BKchem en wikipedia Tomas_er CommonsHelper 2007-02-01 Ampzapper wikipedia en Ampzapper original upload log page en wikipedia Trans-2-pentene svg 2007-02-01 05 17 Ampzapper 967×676×0 931 bytes <nowiki>trans-2-pentene chemical structure made using BKchem</nowiki> Pent-2-ene |