Malvin
Malvin is a naturally occurring chemical of the anthocyanin family.
Malvin reacts in the presence of H2O2 to form malvone. The ortho-benzoyloxyphenylacetic acid esters reaction product is dependant of the pH: it is obtained under acidic conditions whereas under neutral conditions, the reaction product is the 3-O-acyl-glucosyl-5-O-glucosyl-7-hydroxy coumarin.
Natural occurrences
It is a diglucoside of malvidin mainly found as a pigment in herbs like Malva, Primula and Rhododendron. M. sylvestris also contains malonylmalvin.The characteristic floral jade coloration of Strongylodon macrobotrys has been shown to be an example of copigmentation, a result of the presence of malvin and saponarin in the ratio 1:9.