9,10,11-trimethoxy-1-nitro-5-oxo-2,3,5,6,7,11b-hexahydro-1H-dibenzo[a,c]cycloheptene-2-carboxylic acid methyl ester

[1-(6-but-3-enyl-2,3,4-trimethoxy-phenyl)-prop-2-ynyloxy]-tert-butyl-dimethyl-silane

1-but-3-enyl-2-[1-(tert-butyl-dimethyl-silanyloxy)-3-trimethylsilanyl-prop-2-ynyl]-3,4,5-trimethoxy-benzene