Abstract
The detailed investigation of endophytic Streptomyces sp. T1B1 was performed during a search for new structural and active compounds. The strain T1B1 was isolated from the old bast tissue of Taxus yunnanensis and determined to be a member of Streptomyces, according to the 16S rRNA analysis. The extracts from the PDA solid fermentation media of Streptomyces sp. T1B1 were purified and four β-lactones were isolated. They were identified as 4α-(3,5-dihydroxy hexyl)-3α-methyl-2-oxetanone (1), 4α-(3-methyl-4-formyloxy-hexyl)-3α-methyl-2-oxetanone (2), 4α-(3,5-dihydroxy-heptyl)-3α-methyl-2-oxetanone (3) and 4α-(3-methyl-4-formyloxy-heptyl)-3α-methyl-2-oxetanone (4) on the basis of spectral data.
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