Related Experiment Video
Updated: May 21, 2026

A Strategy for Sensitive, Large Scale Quantitative Metabolomics
Published on: May 27, 2014
3-O-Methyl-1-isomangostin
Abstract:
IN THE TITLE XANTHONE DERIVATIVE [SYSTEMATIC NAME: 9-hy-droxy-5,10-dimeth-oxy-2,2-dimethyl-11-(3-methyl-but-2-en-1-yl)-2,3,4,12-tetra-hydro-1,7-dioxatetra-phen-12-one], C(25)H(28)O(6), the xanthone ring system is roughly planar, with an r.m.s. deviation of 0.1038 (1) Å. The chromane ring is in a half-chair conformation and the 3-methyl-but-2-enyl substituent is axially attached with an (+)-anti-clinal conformation. Two weak intra-molecular C-H⋯O inter-actions generate two S(6) ring motifs. In the crystal, mol-ecules are linked into ribbons along the c axis by O-H⋯O and weak C-H⋯O hydrogen bonds. A π-π inter-action, with a centroid-centroid distance of 3.5413 (8) Å, is also observed.
Related Concept Videos
Stereoisomers
Stereoisomerism of Cyclic Compounds
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
Prochirality
Stereoisomerism
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Naming Enantiomers
