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. Author manuscript; available in PMC: 2019 Sep 1.
Published in final edited form as: Org Lett. 2019 Feb 14;21(5):1374–1378. doi: 10.1021/acs.orglett.9b00066

Figure 1.

Figure 1.

Structures of HBCs. Compounds 1, 2, 7, and 10 were isolated from Streptomyces sp. KIB-027. 3, 5, 6, 8, and 11 were isolated from the mutants. 9 was isolated from Streptomyces lividans anmBCDE.