2,4-pentadienal, 2-methyl-5-(3-pyridinyl)- 2-methyl-5-pyridin-3-ylpenta-2,4-dienal InChI=1/C11H11NO/c1-10(9-13)4-2-5-11-6-3-7-12-8-11/h2-9H,1H3/b5-2+,10-4