methyl {3-(2-methoxycarbonyl-(E)-ethenyl)-4-[6-(4-methoxyphenyl)-(5E)-hexenyloxy]phenylaminocarbonyl}butanoate

ethyl-3-{2-[6-(4-methoxyphenyl)-(5E)-hexenyloxy]-5-[4-(dimethylaminocarbonyl)butanoyl]phenyl}propanoate

tert-butyl-3-{2-[6-(4-methoxyphenyl)-(5E)-hexenyloxy]--5-(4-methylphenyl)sulfonylaminophenyl}propanoate

ethyl-4-{3-[2-(ethoxycarbonyl)ethyl]-4-[6-(4-methoxyphenyl)-(5E)-hexenyloxy]phenylcarbonyl}butanoate

methyl-4-[6-(4-methoxyphenyl)-(5E)-hexenyloxyphenylaminocarbonyl]butanoate