(3aS,7aR)-4-[1-Dimethylamino-meth-(Z)-ylidene]-7a-methyl-1-methylene-1,2,3,3a,4,7a-hexahydro-inden-5-one

3-(2-Isopropenyl-[1,3]dithian-2-yl)-propionaldehyde

(1S)-2c-Methoxycarbonylmethyl-1-methyl-5-oxo-1r-cyclopentancarbonsaeure-methylester