t-Butyl 3-[1-[6-(4-methoxyphenyl)hex-5E-enyl]oxy-4-(4-methoxycarbonylbutanamido)benzen-2-yl]propionate

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

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

ethyl-4-{3-[2-(tert-butoxycarbonyl)ethyl]-4-[6-(4-methoxyphenyl)-(5E)-hexenyloxy]phenylaminosulfonyl}butanoate

methyl-3-{5-[3-(mmethoxycarbonyl)benzoylamino]-2-[6-(4-methoxyphenyl)-(5E)-hexenyloxy]phenyl}propanoate