26912-33-4;542-92-7;cyclopenta-1,3-diene;CHEBI:30664;nchembio775-comp8;1,3-CYCLOPENTADIENE;Cyclopentadiene;EINECS 208-835-4;HSDB 2514;Pentole;Pyropentylene;R-Pentine;ghl.PD_Mitscher_leg0.1205;InChI=1/C5H6/c1-2-4-5-3-1/h1-4H,5H