[Syntheses of xanthone derivatives].
D006634:Histamine H1 Antagonists / Q000138:chemical synthesis*; D014966:Xanthenes / Q000138:chemical synthesis*; D044004:Xanthones
D006634:Histamine H1 Antagonists; D014966:Xanthenes; D044004:Xanthones; C036470:1,3-dihydroxy-xanthone