7-[2-(tert-Butyl-dimethyl-silanyloxy)-ethoxy]-2,2-dimethyl-5-(3-methyl-but-2-enyl)-benzo[1,3]dioxin-4-one

7-(2-Hydroxy-ethoxy)-2,2-dimethyl-5-(3-methyl-but-2-enyl)-benzo[1,3]dioxin-4-one

4-(2-Allyloxycarbonylamino-ethoxy)-2-hydroxy-6-(3-methyl-but-2-enyl)-benzoic acid (E)-(S)-4-iodo-1-(2-triisopropylsilanyloxy-ethyl)-but-3-enyl ester

2-Allyloxy-4-(2-allyloxycarbonylamino-ethoxy)-6-(3-methyl-but-2-enyl)-benzoic acid (E)-(S)-4-((E)-4-methoxyimino-but-2-enoylamino)-1-(2-triisopropylsilanyloxy-ethyl)-but-3-enyl ester