Title: Theaflavine
CAS Registry Number: 4670-05-7
CAS Name: 1,8-Bis[(2R,3R)-3,4-dihydro-3,5,7-trihydroxy-2H-1-benzopyran-2-yl]-3,4,6-trihydroxy-5H-benzocyclohepten-5-one
Molecular Formula: C29H24O12
Molecular Weight: 564.49
Percent Composition: C 61.70%, H 4.29%, O 34.01%
Literature References: From black tea extracts: Roberts, Myers, J. Sci. Food Agric. 10, 176 (1959). Structure: Takino et al., Tetrahedron Lett. 1965, 4019. Configuration: Brown et al., ibid. 1966, 1193.
Properties: Crystals from water, dec 237-240°. Absorption max (ethanol): 216, 271, 384, 470 nm (e 35500, 19500, 8700, 3600).
Absorption maximum: Absorption max (ethanol): 216, 271, 384, 470 nm (e 35500, 19500, 8700, 3600)
Derivative Type: Nonaacetate
Molecular Formula: C47H42O21
Molecular Weight: 942.82
Percent Composition: C 59.87%, H 4.49%, O 35.64%
Properties: Crystals, mp 167-168°. uv max (alc): 211, 250, 314, 353 nm (e 25100, 13200, 7100, 4700).
Melting point: mp 167-168°
Absorption maximum: uv max (alc): 211, 250, 314, 353 nm (e 25100, 13200, 7100, 4700)
|