(3E,9E,11Z)-3-Methoxymethoxy-12-methyl-cyclotrideca-3,9,11-triene-1,1,7,7-tetracarboxylic acid di-tert-butyl ester dimethyl 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