6,6,11-trimethyl-4-n-propyl-2H,6H,12H-benzo[1,2-b:3,4-b':5,6-b'']tripyranyl-2,12-dione

1-benzyl-2,4-dimethyl-6-oxo-1,4,5,6-tetrahydro-pyridine-3-carboxylic acid ethyl ester

(E)-1-(2,5,5-trimethylcyclopent-1-en-1-yl)but-2-en-1-one

3-(benzylamino-methylene)-hept-6-ene-2,4-dione

(E)-1-((3aR,6aR)-4,4-Dioxo-3-phenyl-3a,4,6,6a-tetrahydro-1-oxa-4λ6-thia-2,5-diaza-pentalen-5-yl)-but-2-en-1-one