Summary
Aloenin has been established to be 4-methoxy-6-(2-β-D-glucopyranosyloxy-4-hydroxy-6-methylphenyl)-2-pyrone; it shows an inhibitory activity for gastric juice secretion. Rats metabolized it to 4-methoxy-6-(2,4-dihydroxy-6-methylphenyl)-2-pyrone, 2,5-dimethyl-7-hydroxychromone and glucose, which were excreted in the feces and the urine. The distribution of the radioactivity originating from14C-labeled aloenin was studied. The tracer found in the kidney and the liver reached 60% of the amount administered 24 h after feeding and decreased rapidly in the next 24 h.
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TLC analyses were performed on a glass plate (0.25 mm thick) coated with silica gel (Merck Si gel 60 G) using 4 different solvent systems [(a) CHCl3:MeOH=5∶1, (b) EtOAc:hexane=1∶9, (c) CHCl3:MeOH=19∶1 and (d) CHCl3:MeOH=2∶3]. HPLC analyses were carried out with 3 different systems [(a) JASCO WC-03-500 column (EtOAc:hexane=7∶3), (b) JASCO SV-02-500 column (H2O:MeOH=4∶1) and (c) JASCO SV-02-500 column (H2O:MeOH=9∶1)].
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Hirata, T., Sakano, S. & Suga, T. Biotransformation of aloenin, a bitter glucoside constituent ofAloe arborescens, by rats. Experientia 37, 1252–1253 (1981). https://doi.org/10.1007/BF01948341
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DOI: https://doi.org/10.1007/BF01948341