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. Author manuscript; available in PMC: 2018 Nov 8.
Published in final edited form as: J Am Chem Soc. 2017 Oct 24;139(44):15868–15877. doi: 10.1021/jacs.7b08749

Figure 1.

Figure 1

Molecular structures of antibiotic CJ-16,264 [(+)-1], its originally assigned structure [(+)-1a], and other related pyrrolizidine natural products CJ-16,367 (A), pyrrolizilactone (B), UCS-1025A (C), and UCS-1025B (D).