Peonidin
Title: Peonidin
CAS Registry Number: 134-01-0
CAS Name: 3,5,7-Trihydroxy-2-(4-hydroxy-3-methoxyphenyl)-1-benzopyrylium chloride
Additional Names: 3,4¢,5,7-tetrahydroxy-3¢-methoxyflavylium chloride; 3,4¢,5,7-tetrahydroxy-3¢-methoxy-2-phenylbenzopyrylium chloride
Molecular Formula: C16H13ClO6
Molecular Weight: 336.72
Percent Composition: C 57.07%, H 3.89%, Cl 10.53%, O 28.51%
Literature References: The aglucon of peonin: R. Willstätter, T. J. Nolan, Ann. 408, 136 (1915). Structure and synthesis: T. J. Nolan et al., J. Chem. Soc. 1926, 1968; S. Murakami, R. Robinson, ibid. 1928, 1537.
 
Derivative Type: Monohydrate
Properties: Reddish-brown needles from aq 20% hydrochloric acid soln. Moderately sol in water giving a reddish-brown soln. Sol in alc giving a purplish-red soln.
 
Derivative Type: 3,5-Diglucoside
Additional Names: 3,5-Bis(b-D-glucopyranosyloxy)-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-1-benzopyrylium chloride; peonin
Molecular Formula: C28H33ClO16
Molecular Weight: 661.01
Percent Composition: C 50.88%, H 5.03%, Cl 5.36%, O 38.73%
Properties: From deep violet-red peonies: R. Willstätter, T. J. Nolan, loc. cit. Synthesis: R. Robinson, A. R. Todd, J. Chem. Soc. 1932, 2488. Deep purple needles with water of crystn from dil HCl, mp 165-167° (dec).
Melting point: mp 165-167° (dec)

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