Formic acid (R)-4,4-dibromo-1-ethyl-but-3-enyl ester

(1S)-1-[(3aR,5S,6aR)-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]ethane-1,2-diol

(S)-Methoxy-phenyl-acetic acid (R)-1-ethyl-but-3-ynyl ester

(S)-Methoxy-phenyl-acetic acid (S)-1-ethyl-but-3-ynyl ester