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. Author manuscript; available in PMC: 2020 Jan 31.
Published in final edited form as: Nat Chem. 2017 Jun 19;9(10):944–949. doi: 10.1038/nchem.2801

Figure 1 |. The structures of tubingensins B and A.

Figure 1 |

a, Tubingensin B (1) possesses an intricate hexacyclic ring system bearing a bicyclo[3.2.2]nonane core and five stereogenic centres, three of which are quaternary. Although its simpler counterpart tubingensin A (2) has been synthesized previously, there is no reported total synthesis of 1. b, Crystal structure oftubingensin B (1)2.