A new alkaloid antibiotic tetrazomine was isolated from the culture broth of Saccharothrix mutabilis subsp. chichijimaensis subsp. nov., and its structure was determined to be I by means of spectroscopic measurements. It has an unusual structure which consists of six rings, including piperidine, piperazine, oxazole, and pyrrolidine rings.
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SATO et al. (1991) studied this question.
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