Toluene-4-sulfonic acid (R)-5-[(4R,6S)-6-((S)-1-amino-ethyl)-2,2-dimethyl-[1,3]dioxan-4-yl]-1-{(R)-3-[(4S,5R)-2,2-dimethyl-5-((R)-1-methyl-pentyl)-[1,3]dioxolan-4-yl]-2-methyl-propyl}-pentyl ester
N-benzyloxycarbonyl-HFB2
N-benzyloxycarbonyl-HFB1 bis(acetonide)
N-benzyloxycarbonyl-HFB1