Abstract
The title compound (trivial name brasixanthone B), C23H22O5, isolated from Calophyllum gracilentum, is characterized by a xanthone skeleton of three fused six-membered rings plus an additional fused pyrano ring and one 3-methylbut-2-enyl side chain. The core xanthone moiety is almost planar, with a maximum deviation 0.057 (4) Å from the mean plane. In the molecule, an intramolecular O—H...O hydrogen bond forms an S(6) ring motif. The crystal structure features intermolecular O—H...O and C—H...O interactions.
Funder
Sarawak Research Development Council
Publisher
International Union of Crystallography (IUCr)
Subject
Organic Chemistry,Inorganic Chemistry,Analytical Chemistry
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