Petunidin
Title: Petunidin
CAS Registry Number: 1429-30-7
CAS Name: 2-(3,4-Dihydroxy-5-methoxyphenyl)-3,5,7-trihydroxy-1-benzopyrylium chloride
Additional Names: 3,3¢,4¢,5,7-pentahydroxy-5¢-methoxyflavylium chloride; petunidol
Molecular Formula: C16H13ClO7
Molecular Weight: 352.72
Percent Composition: C 54.48%, H 3.71%, Cl 10.05%, O 31.75%
Literature References: The aglucone of petunin: Willstätter, Burdick, Ann. 412, 217 (1917). Synthesis: Bradley et al., J. Chem. Soc. 1930, 793; Robinson, Robinson, Biochem. J. 25, 1687 (1931). Chromatographic separation: Spaeth, Rosenblatt, Anal. Chem. 22, 1321 (1950).
Properties: Gray-brown leaflets or prisms from dil HCl.
 
Derivative Type: 3,5-Diglucoside
CAS Registry Number: 25846-73-5
CAS Name: 2-(3,4-Dihydroxy-5-methoxyphenyl)-3,5-bis(b-D-glucopyranosyloxy)-7-hydroxy-1-benzopyrylium chloride
Additional Names: petunin
Molecular Formula: C28H33ClO17
Molecular Weight: 677.00
Percent Composition: C 49.67%, H 4.91%, Cl 5.24%, O 40.18%
Literature References: From Petunia hybrida Hort., Solanaceae: Willstätter, Burdick, loc. cit. Synthesis: Bell, Robinson, J. Chem. Soc. 1934, 1604.
Properties: Violet plates with a coppery luster from dil HCl, mp ~178°. Absorption max (methanolic HCl): 540 nm.
Melting point: mp ~178°
Absorption maximum: Absorption max (methanolic HCl): 540 nm

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