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. 2015 Sep 29;54(47):14044–14048. doi: 10.1002/anie.201507977

Figure 1.

Figure 1

A) Previously synthesized ingenane targets: ingenol (1), ingenol mebutate (2; the active ingredient in Picato), and an ester derivative 3. B) Current ingenane targets with varying oxidation states. C) A synthetic plan that maximizes divergency from previously synthesized intermediate 15.