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(2007/10/03)benzyl (3S)-4-[benzyl-(2-ethoxy-2-oxoethyl)amino]-3-(tert-butoxycarbonylamino)-4-oxobutanoate
benzyl 2-[(2S)-4-benzyl-3,6-dioxopiperazin-2-yl]acetate
2-[(2S)-4-benzylpiperazin-2-yl]ethanol
di-tert-butyl dicarbonate
tert-butyl (2S)-4-benzyl-2-(2-hydroxyethyl)piperazine-1-carboxylate
{(R)-1-[(S)-2-(2-Methoxy-ethyl)-4-(naphthalene-1-carbonyl)-piperazin-1-ylmethyl]-2-tritylsulfanyl-ethyl}-carbamic acid tert-butyl ester
{(R)-1-[(S)-2-(2-Cyclopropoxy-ethyl)-4-(naphthalene-1-carbonyl)-piperazin-1-ylmethyl]-2-tritylsulfanyl-ethyl}-carbamic acid tert-butyl ester
(S)-2-[(2-carbamoyl-2-methyl-propylcarbamoyl)-methyl]-4-[2-(3-fluoro-2-methyl-benzyl)-1-phenyl-indolizine-3-carbonyl]-piperazine-1-carboxylic acid tert-butyl ester
(S)-4-[2-(3-fluoro-2-methyl-benzyl)-1-phenyl-indolizine-3-carbonyl]-2-{[(tetrahydropyran-4-ylmethyl)-carbamoyl]-methyl}-piperazine-1-carboxylic acid tert-butyl ester
{(S)-1-tert-butoxycarbonyl-4-[2-(3-fluoro-2-methyl-benzyl)-1-phenyl-indolizine-3-carbonyl]-piperazin-2-yl}-acetic acid