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13C NMR has been used to demonstrate the metabolism of dilute solutions of labeled formaldehyde by Escherichia coli to methanol, formate, carbon dioxide, and several other unidentified metabolites… (More)
The biosynthesis of the Klebsiella K3 serotype polysaccharide has been elucidated by 13 C NMR spectroscopy of intact cultures under physiological conditions. Biosynthetic enrichment with [1- 13 C]… (More)
Abstract A novel clerodane-type furano-diterpene with the 9,10-abeo-methyl group has been isolated from Croton megalocarpus as a major constituent. Structure elucidation has been achieved by a… (More)
Klebsiella K3 serotype polysaccharide has been biosynthetically enriched by growth on [13C6]glucose and its 13C n. m. r. spectrum has been fully assigned using a phase-sensitive… (More)
The α-configuration of the 1-methyl group in 1α,17α-dimethyl-17β-acetoxy-5α-androstan-3-one has been unambiguously confirmed (a) by dehydrogenation with 2,3-dichloro-5,6-dicyanobenzoquinone, and (b)… (More)
The metabolism of [13C]formaldehyde in E.coli has been observed by proton NMR; the reverse-POMMIE pulse sequence, which saturates all 1H signals and then transfer magnetisation from 13C to 1H,… (More)