(1R,3S)-8-Allyloxy-1-allyloxymethyl-3-(tert-butyl-dimethyl-silanyloxymethyl)-5,7-dimethoxy-6-methyl-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester

(1R,3S)-8-Allyloxy-1-allyloxymethyl-3-(tert-butyl-dimethyl-silanyloxymethyl)-5,7-dimethoxy-6-methyl-1,2,3,4-tetrahydro-isoquinoline

(S)-3-[5-(tert-Butyl-dimethyl-silanyloxy)-2,4-dimethoxy-3-methyl-phenyl]-2-(9H-fluoren-9-ylmethoxycarbonylamino)-propionic acid