Takenaka Y., Tanahashi T., Nagakura N. & Hamada N.
(2000):
Production of xanthones with free radical scavenging properties, emodin and sclerotiorin by the cultured lichen mycobionts of Pyrenula japonica,
Zeitschrift für Naturforschung C,
55: 910–914
From the cultures of the spore-derived mycobionts of the lichen Pyrenula japonica, two new xanthones, 1,8-dihydroxy-3-hydroxymethyl-5-methoxyxanthone and 1,2,8-trihydroxy-5-methoxy-3-methylxanthone, were isolated along with 1,7-dihydroxy-3-methylxanthone, 1,5,8-trihydroxy-3-methylxanthone, 1,8-dihydroxy-5-methoxy-3-methylxanthone, emodin and sclerotiorin. Their structures were determined by spectroscopic methods. Sclerotiorin was isolated for the first time from lichen mycobionts. Radical scavenging …
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