[4S-4α,8α]-1,6-dioxo-8-methyl-4-phenyl-1,3,4,6,7,8-hexahydropyrido[2,1-c][1,4]oxazine-9-carboxylic acid methyl ester

(2R,3R)-1-[Bis-(4-methoxy-phenyl)-methyl]-4-oxo-3-vinyl-azetidine-2-carboxylic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester

(2R,3R)-1-[Bis-(4-methoxy-phenyl)-methyl]-4-oxo-3-vinyl-azetidine-2-carboxylic acid (1S,2R,5S)-2-isopropyl-5-methyl-cyclohexyl ester

2,3-dihydro-2-methyl-7-trans-propenyl-4H,5H-thiopyrano<4,3-b>pyran-4,5-dione