5,8-Dihy-droxy-2,2-dimethyl-12-(3-methyl-but-2-en-yl)pyrano[3,2- b ]xanthen-6-one (brasixanthone B).

Autor: Binti Seruji NMU; Centre of Applied Science Studies, Universiti Teknologi MARA Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia., Rosli MM; X-ray Crystallography Unit, School of Physics, University Sains Malaysia, 11800 USM, Penang, ., Malaysia., Jong VYM; Centre of Applied Science Studies, Universiti Teknologi MARA Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia., Karunakaran T; Centre of Drug Research, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia.; School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia., Lizazman MA; Centre of Applied Science Studies, Universiti Teknologi MARA Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia., Marlina A; Research Centre for Chemistry, National Research and Innovation Agency, Indonesia.; Department of Chemistry, Faculty of Science, University of Malaya, 50603, Malaysia., Binti Halid YY; Centre of Applied Science Studies, Universiti Teknologi MARA Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia.
Jazyk: angličtina
Zdroj: IUCrData [IUCrdata] 2023 Jan 06; Vol. 8 (Pt 1), pp. x221198. Date of Electronic Publication: 2023 Jan 06 (Print Publication: 2023).
DOI: 10.1107/S2414314622011981
Abstrakt: The title compound (trivial name brasixanthone B), C 23 H 22 O 5 , 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-methyl-but-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 mol-ecule, an intra-molecular O-H⋯O hydrogen bond forms an S (6) ring motif. The crystal structure features inter-molecular O-H⋯O and C-H⋯O inter-actions.
(© Binti Seruji et al. 2023.)
Databáze: MEDLINE
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