2,4,6,8-Nonatetraenoic acid, 9-(2-acetyl-5,5-dimethyl-1-cyclopenten-1-yl)-3,7-dimethyl-, (all-E)- 50890-42-1 9-(2-Acetyl-5,5-dimethyl-1-cyclopenten-1-yl)-3,7-dimethyl-2,4,6,8-nonatetraenoic acid (all-E)- Ro 8-7699 all-trans-9-(2-Acetyl-5,5-dimethyl-1-cyclopenten-1-yl)-3,7-dimethyl-2,4,6,8-nonatetraenoic acid