7a(R)-methyl (7a-methyl-3-phenyl-tetrahydro-pyrrolo[2,1-b]oxazol-5-ylidene)acetate

methyl (5-butyl-furan-2-yl)acetate

4-methoxycarbonyl-3-butynyl phenyl ketone

methyl 6-oxo-8-phenylocta-2,7-diynoate

methyl 6-oxo-11-[(tetrahydro-2H-pyran-2-yl)-oxy]undeca-2,7-diynoate