ethyl (E)-7-(benzyloxy)hept-2-en-4-ynoate

(E)-8-(benzyloxy)oct-3-en-5-yn-2-ol

(3S,4S)-3-tert-butoxycarbonylamino-4-hydroxy-4-methyl-2-pyrone

(2S,3R)-methyl 2-azido-5-benzyloxy-3-hydroxy-3-methylpentanoate

5-benzyloxy-2-pentyn-1-ol