(3R,4S)-1-(buta-2,3-dien-1-yl)-3-methoxy-4-((R)-1-methoxy-2-phenylbuta-2,3-dien-1-yl)azetidin-2-one

(R)-1-((2S,3R)-1-(buta-2,3-dien-1-yl)-3-methoxy-4-oxoazetidin-2-yl)-2-phenylbuta-2,3-dien-1-yl acetate

(R)-1-((2S,3R)-1-(buta-2,3-dien-1-yl)-3-methoxy-4-oxoazetidin-2-yl)-2-(4-methoxyphenyl)buta-2,3-dien-1-yl acetate

(6R,8R,9R)-9-methoxy-6-methyl-4,5-dimethylene-1-azabicyclo[6.2.0]decane-7,10-dione