Rabbit skeletal alpha-tropomyosin chains are in register.

2-Acetamido-2-deoxy-3-O-(D-2-propionyl-L-alanine)-D-glucopyranose ($\text{5}$) and 2-acetamido-2-deoxy-3-O-(D-2-propionyl-L-alanyl-D-isoglutamine)-D-glucopyranose ($\text{10}$) have been synthesized by condensation of benzyl 2-acetamido-4,6-O-benzylidene-3-O-(D-1-carboxyethyl)-2-deoxy-β-D-glucopyranoside ($\text{1}$) respectively with the L-alanine derivative $\text{2}$ and the dipeptide $\text{7}$, followed by debenzylidenation and hydrogenolysis. Compound $\text{10}$ is adjuvant active, whereas $\text{5}$ is inactive, so that $\text{10}$ is the smallest adjuvant active structure for the time being.