2,4,6,8-Nonatetraenoic acid, 3,7-dimethyl-9-(3-pyridinyl)-, (all-E)- 2,4,6,8-Nonatetraenoic acid,3,7-dimethyl-9-(3-pyridinyl)-, (all-E)- 3,7-Dimethyl-9-(3-pyridinyl)-2,4,6,8-nonatetraenoic acid (all-E)- 55079-86-2 Ro 11-1272