(E)-2-tert-Butoxycarbonyl-2-((2Z,4E)-6-hydroxy-2-methyl-hexa-2,4-dienyl)-8-methoxycarbonyl-4-methoxymethoxy-non-4-enedioic acid 1-tert-butyl ester 9-methyl ester

(E)-2-((2Z,4E)-6-Acetoxy-2-methyl-hexa-2,4-dienyl)-2-tert-butoxycarbonyl-8-methoxycarbonyl-4-methoxymethoxy-non-4-enedioic acid 1-tert-butyl ester 9-methyl ester

2-[(2Z,4E)-6-(tert-Butyl-diphenyl-silanyloxy)-2-methyl-hexa-2,4-dienyl]-2-((E)-5-hydroxy-2-methoxymethoxy-pent-2-enyl)-malonic acid di-tert-butyl ester

(E)-2-tert-Butoxycarbonyl-2-[(2Z,4E)-6-(2,2-dimethyl-propionyloxy)-2-methyl-hexa-2,4-dienyl]-8-methoxycarbonyl-4-methoxymethoxy-non-4-enedioic acid 1-tert-butyl ester 9-methyl ester

2-[(2Z,4E)-6-(tert-Butyl-diphenyl-silanyloxy)-2-methyl-hexa-2,4-dienyl]-2-((E)-5-methanesulfonyloxy-2-methoxymethoxy-pent-2-enyl)-malonic acid di-tert-butyl ester