Title: Diosmin
CAS Registry Number: 520-27-4
CAS Name: 7-[[6-O-(6-Deoxy-a-L-mannopyranosyl)-b-D-glucopyranosyl]oxy]-5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-4H-1-benzopyran-4-one
Additional Names: 3¢,5,7-trihydroxy-4¢-methoxyflavone-7-rutinoside; 5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-(O6-a-L-rhamnopyranosyl-b-D-glucopyranosyloxy)chromen-4-one; 5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-b-rutinosyloxy-4H-chromen-4-one; diosmetin 7-b-rutinoside; barosmin; buchu resin
Trademarks: Diosmil (Bellon); Diosven (CT); Diovenor (Innothža); Flebosmil (Bouchara); Flebosten (Bonomelli); Hemerven (Interdelta); Insuven (Berenguer); Litosmil (Evans); Tovene (Kali-Chemie); Varinon (Exa); Ven-Detrex (Zyma); Venosmine (Geymonat)
Molecular Formula: C28H32O15
Molecular Weight: 608.54
Percent Composition: C 55.26%, H 5.30%, O 39.44%
Literature References: Naturally occurring flavonic glycoside; rhamnoglycoside of diosmetin, q.v. Isolation from various plant sources: O. A. Oesterle, G. Wander, Helv. Chim. Acta 8, 519 (1925). Elucidation of structure: G. Zemplén, R. Bognár, Ber. 76, 452 (1943). Prepn from hesperidin, q.v.: eidem, ibid.; N. B. Lorette et al., J. Org. Chem. 16, 930 (1951). Isoln from lemon peel (Citrus limon Linn. Rutaceae): R. M. Horowitz, J. Org. Chem. 21, 1184 (1956); from Zanthoxylum avicennae, Rutaceae: H. R. Arthur et al., J. Chem. Soc. 1956, 632; H. R. Arthur et al., ibid. 1959, 4007; from flowers of Sophora microphylla Ait. Leguminosae: L. H. Briggs et al., ibid. 1960, 1955. Toxicology studies: H. Heusser, W. Osswald, Arch. Farmacol. Toxicol. 3, 33 (1977). NMR spectrum: J. L. Nieto, A. M. Gutierrez, Spectrosc. Lett. 19, 427 (1986). Mechanism of action: C. Boudet, L. Peyrin, Arch. Int. Pharmacodyn. 283, 312 (1986). Pharmacology: J. R. Caseley-Smith, J. R. Caseley-Smith, Agents Actions 17, 1 (1985); M. Damon et al., Arzneim.-Forsch. 37, 1149 (1987). HPLC determn in biological fluids: D. Baylocq et al., Ann. Pharm. Fr. 41, 115 (1983). Clinical study in post-phlebitic ulcers: M. C. Nguyen, K. Morere, Gaz. Med. 92, 71 (1985); in acute hemorrhoids: A. Tajana et al., Minerva Med. 79, 387 (1988). Clinical trial in chronic venous insufficiency: R. Laurent et al., Int. Angiol. 7, Suppl. 2, 39 (1988).
Derivative Type: Monohydrate
Molecular Formula: C28H32O15.H2O
Molecular Weight: 626.56
Percent Composition: C 53.67%, H 5.47%, O 40.86%
Properties: mp 275-277° (dec) (Zemplén). Also reported as fine needles from aq pyridine or aq DMF, mp 283° (dec) (Briggs). uv max (ethanol): 255, 268, 345 nm (log e 4.28, 4.25, 4.30). Practically insol in water, alcohol.
Melting point: mp 275-277° (dec) (Zemplén); mp 283° (dec) (Briggs)
Absorption maximum: uv max (ethanol): 255, 268, 345 nm (log e 4.28, 4.25, 4.30)
Derivative Type: Flavonoid extract
Trademarks: Daflon (Servier); Flebopex (Profarma); Flebotropin (Bago)
Therap-Cat: Capillary protectant.
Keywords: Vasoprotectant.
Diosphenol Dioxadrol Dioxane Dioxaphetyl Butyrate Dioxethedrine

Systematic (IUPAC) name
5-Hydroxy-2-(3-hydroxy-4-methoxyphenyl)- 7-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy -6-[[(2R,3R,4R,5R,6S) -3,4,5-trihydroxy-6-methyloxan-2-yl]oxymethyl]oxan-2-yl]oxychromen-4-one
Clinical data
AHFS/Drugs.com International Drug Names
Legal status  ?
Routes oral
CAS number 520-27-4 N
ATC code C05CA03
PubChem CID 5281613
ChemSpider 4444932 YesY
KEGG D07858 YesY
Chemical data
Formula C28H32O15 
Mol. mass 608.545 g/mol
 N (what is this?)  (verify)

Diosmin is a flavone, a member of the flavonoid family. Diosmin aglycone is diosmetin. It can be found in Teucrium gnaphalodes, a plant endemic to the Iberian Peninsula.[1]