[2S-(2α,3β,4β)]-3-[2-(1,1-Dimethylethoxy)-2-oxoethyl]-4-(1-methylethenyl)-1,2-pyrrolidinedicarboxylic Acid Bis(1,1-Dimethylethyl) Ester is an intermediate in the synthesis of Domoic Acid (D531300), an excitatory amino acid isolated from the red alga Chondria armata Okamura.