Journal
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
Volume 93, Issue 1, Pages 54-59Publisher
SOC BIOSCIENCE BIOENGINEERING JAPAN
DOI: 10.1263/jbb.93.54
Keywords
Monascus; Penicillium; azaphilone; monascorubrin; (10Z)-monascorubrin; (10Z)-3-(9a-methyl-3-octanoyl-2,9-dioxo-9,9a-dihydro-2H-furo[3,2-g]isochromen-6-yl)-acrylic acid
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A fungal strain, Penicillium sp. AZ, has been found to produce the monascorubramine homologues, PP-V [(10Z)-3-(9a-methyl-3-octanoyl-2,9-dioxo-2,7,9,9a-tetrahydro-furo[3,2-g]isoquinolin-6-yl)-acrylic acid] and PP-R [(10Z)-7-(2-hydroxyethyl)-monascorubramine] when cultured in a medium composed of soluble starch, ammonium nitrate, yeast extract, and citrate buffer, pH 5.0. When ammonium nitrate was omitted from the culture medium, PP-V and PP-R production was replaced by orange (PP-O) and yellow-orange (PP-V) pigment production. The structures of these pigments were determined by FAB-MS and H-1 and C-13 NMR to be novel compounds, (10Z)-3-(9a-methyl-3-octanoyl-2,9-dioxo-9,9a-dihydro-2H-furo[3,2-g]isochronien-6-yl)-acrylic acid and (10Z)-monascorubrin, respectively.
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