[(2S,3aR,5S,6S,6aR)-5-[(1R)-1-benzoyloxy-2-[(2R,3R,4S,5S)-3,4-dibenzoyloxy-5-[(1R)-1-benzoyloxy-2-trityloxyethyl]oxolan-2-yl]oxyethyl]-2-cyano-2-methyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-6-yl] benzoate 、
silver trifluoromethanesulfonate 以21%的产率得到