Lumiflavine
Title: Lumiflavine
CAS Registry Number: 1088-56-8
CAS Name: 7,8,10-Trimethylbenzo[g]pteridine-2,4(3H,10H)-dione
Additional Names: 7,8,10-trimethylisoalloxazine
Molecular Formula: C13H12N4O2
Molecular Weight: 256.26
Percent Composition: C 60.93%, H 4.72%, N 21.86%, O 12.49%
Literature References: Irradiation product of riboflavine. Isoln: Warburg, Christian, Biochem. Z. 266, 377 (1933). Structure: Kuhn, Rudy, Ber. 67, 1298 (1934). Prepn: Tishler, Wellman, US 2417143 (1947 to Merck & Co.); Birch, Moye, J. Chem. Soc. 1958, 2622; Yoneda et al., Chem. Pharm. Bull. 20, 1832 (1972).
Properties: Orange crystals from 12% acetic acid, mp 320°. Purified by sublimation in vacuum, mp 330°. Freely sol in chloroform; very sparingly sol in water and most organic solvents. Aq and chloroformic solns fluoresce green. uv max: 269, 355, 445 nm (e 38,800, 11,700, 11,800) in 0.1N NaOH and 264, 373, 440 nm (e 34,700, 11,400, 10,400) in 0.1N HCl.
Melting point: mp 320°; mp 330°
Absorption maximum: uv max: 269, 355, 445 nm (e 38,800, 11,700, 11,800) in 0.1N NaOH and 264, 373, 440 nm (e 34,700, 11,400, 10,400) in 0.1N HCl

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