1-benzyloxycarbonyl-4-hydroxy-4-phenylpiperidine

1-benzyloxycarbonyl-4-phenyl-1,2,3,6-tetrahydropyridine

benzyl 3,4-dihydroxy-4-phenylpiperidine-1-carboxylate

benzyl 3-formyl-3-phenylpyrrolidine-1-carboxylate

3-benzyloxy-1-benzyloxycarbonyl-4-hydroxy-4-phenyl piperidine