(2R,3S)-1-benzyloxycarbonyl-(3-benzyloxy-2-p-methoxyphenyl)piperidine

(2R,3S)-3-benzyloxycarbonyl-2-p-methoxyphenylpiperidine

3-benzoyloxy-piperidine-1,2-dicarboxylic acid 1-benzyl ester

(1R,2S)-benzyl N-(2-benzyloxy-1-p-methoxyphenylbut-3-enyl)carbamate