Kigamicin A (1), B (2), C (3), D (4) and E (5) are novel antitumor antibiotics. Their structures were determined by spectroscopic analyses including various NMR measurements. Kigamicins have a unique aglycone of fused octacyclic ring system containing seven of six-membered rings and one oxazolidine. The aglycone links a sugar chain composed of one to four deoxysugars. These sugars were found to be amicetose and oleandrose.
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Kunimoto et al. (2003) studied this question.
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