PubMed · 9239101
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P Taurand. 1997. [The statins].. https://pubmed.ncbi.nlm.nih.gov/9239101/
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Solid dispersions were prepared with the extremely poorly water soluble drug, probucol and the water soluble polymers, polyvinyl pyrrolidone (PVP), polyacrylic acid (PAA) or polyethylene oxide (PEO) and blends of these polymers. The solid dispersions were prepared either by the solvent evaporation method, or by compression moulding into films. The materials were characterised by a combination of thermal analysis and FT-Raman spectroscopy. The physical state of the drug was observed to be dependent on the carrier, thus the PVP solid dispersions contained amorphous probucol, whilst the PAA and PEO systems contained the crystalline polymorph II. The method of production was not found to greatly influence the state of the drug in the solid dispersion. The greatest extent of release into solution was observed for the binary blend of drug and PEO, and the blending of polymers was not found to have any advantageous effects in this study.
Investigation of the post-PKS biosynthetic steps to the cholesterol-lowering agent lovastatin (1) using an Aspergillus terreus strain with a disrupted lovC gene, which is essential for formation of 4a,5-dihydromonacolin L (3), shows that 7 and 3 are precursors to 1, and demonstrates that lovastatin diketide synthase (lovF protein) does not require lovC.
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