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1.D.41 The Sprotetonate-type Ionophore (Spirohexanolide) Family

Spirohexanolide A (1a) and B (1b) complise of family of spirotetonate products that have ionophoric activities, presumably functioning like nisin.  They are produced by Streptomyces plantensis (Jones et al. 2010). 

References associated with 1.D.41 family:

Jones, B.D., J.J. La Clair, C.E. Moore, A.L. Rheingold, and M.D. Burkart. (2010). Convergent route to the spirohexenolide macrocycle. Org Lett 12: 4516-4519. 20849075