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Pilot-scale hydroxylation of FR901459, an immunosuppressive cyclosporine derivative, was performed using resting cells of a Gram-positive bacteria Lentzea sp. 7887 (as whole-cell biocatalysts) and soybean flour as a substrate dispersant. Through biocatalysis, FR901459 was hydroxylated at position 9, producing AS1837812, an important intermediate in the production of drug candidates against hepatitis...
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