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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Bioorg Med Chem. 2014 Sep 17;22(21):5917–5923. doi: 10.1016/j.bmc.2014.09.016

Figure 1.

Figure 1

Chemical structures of the saponin adjuvant QS-21 (1/2, ≈2:1 apiose/xylose) and the aldehyde-containing adjuvant tucaresol (3).